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Not convinced about this page. What does everyone else think? Coming Second 16:16, 7 February 2008 (UTC)

This is basically just an outdated copy of the Half-Life Saga Story Guide's timeline. So even if we do keep it it'll need updating. Also, did whoever put this up get permission from it's creator? I don't think we have any way of knowing.

I vote we delete it. --MattyDienhoff 04:35, 8 February 2008 (UTC)

Aaargh. Despite a lot of people's best efforts, this is still terribly written and laid out. Just thinking about editing it into some sort of shape depresses me, so this is a vote for deletion. Coming Second 16:10, 4 November 2008 (UTC)
Nobody asks me stuff anymore, lolz, I vote delete, sorry dude that wrote this. -- Mega Sean 45 1:57 PM, November 4, 2008 (UTC)

Localized Teleport Technology...

The timeline, in the 20 year gap, makes no reference to the 'cat incident' or the localized teleport tech kleiner developed, removing the need for the xen relay. There's not a particular time frame mentioned, Barney just says "not after last time", but I still think it warrants a mention. 04:59, March 2, 2010 (UTC)gildedlink

Added. Do you have issues with signing?... Klow 11:13, March 2, 2010 (UTC)

Black Mesa Incident and GLaDOS' takeover dates revealed?

Gameinformer, continuing with their Portal 2 supplement this month, just released a timeline of Aperture Science. While seemingly old information at first glance, it altered some of the dates, and most notably of all, may have revealed the date for which the events of the original Half-Life occurred. It states:

"1998 – The untested AI is activated for the first time as one of the planned activities on Aperture’s first annual bring-your-daughter-to-work day. In many ways, the initial test goes well: Within one picosecond of being switched on, GLaDOS becomes self-aware. The "going well" phase lasts for two more picoseconds, at which point GLaDOS takes control of the facility, locks everyone inside, and begins a permanent cycle of testing. Her goal: beat the hated Black Mesa in the race to develop a functioning portal technology. Days later, that race is lost when Black Mesa successfully deploys an interdimensional gate through which an alien race emerges and effectively ends the outside world."

If this is true, and it seems Gameinformer are getting info more or less straight from Valve, is this not one gigantic retcon? For years it has been accepted that the events of Half-Life take place on May 16 between 2000 and 2009, but Gameinformer now states that it was 1998, days after GLaDOS' takeover of Aperture Labs. Whether a mistake or genuine, I know we should wait for confirmation from Valve, but I thought I'd point out this potentially huge revelation. The full supplement may be seen here: Aperture Science: A History. - Halo-343 22:59, March 24, 2010 (UTC)

Placing HL from 2000 to 2009 could place it in 2000, which is only 2 years after 1998, so it's actually not that far. And if that date is actually directly from Valve, this is INDEED awesome, as we can now put HL2 around 2018, and deduce the birth dates of several HL1 series characters, for instance Gordon who'd be born around 1971. However it's not very original to choose the same date as the game release date, imho. They could have chosen a bit earlier or later. And of course we should be sure it's true before jumping to gun, but I'm afraid Valve might never confirm this. But the article introduction really suggests this is all from them. Klow 23:41, March 24, 2010 (UTC)
I just checked, unfortunately it hasn't been updated with that new paragraph. Klow 23:44, March 24, 2010 (UTC)
I felt like asking the validity of that new paragraph directly to the lady who posted the article. Since she gives many contact ways, I chose the Facebook way. She was kind enough to answer me 11 minutes later this: "Nope! All of that information, aside from the introduction, was supplied directly from Valve! Hope that helps!". So, there you go, this is real. We can now unleash this huge retcon through the wiki. :-P Klow 00:30, March 25, 2010 (UTC)
On the contrary however, a couple people over at Steam Forums have emailed valved about this, and received the response "There's no way it could have taken place in the Nineties, since Gordon didn't start at Black Mesa until sometime in the Noughties!"[1][2] from Marc Laidlaw.Mr. Someguy 04:15, April 10, 2010 (UTC)
I wrote to Marc yesterday, and he told me the same. We are more or less back to square 1; we'll correct it soon on the wiki. Klow 09:08, April 10, 2010 (UTC)
I hope so! But its indeed very strange, Gameinformer has questionable sources.. -- 08:45, April 23, 2010 (UTC)

Portal Setting

Since I'm not like listening to 18 minutes of boring speech, please find and "copy" a quote where the Portal setting is in the Portal 2 podcast to me. ASBusinessMagnet 16:09, March 28, 2010 (UTC)

Just listen to it like everybody else. And I've listened to more boring stuff. Klow 16:49, March 28, 2010 (UTC)
Thanks, I found it. They weren't saying that they assume Portal takes place after Half-Life 2, they just said that it does.
I posted that because on mAL I heard that they actually aren't sure of it, and that would criticize this timeline. ASBusinessMagnet 17:06, March 28, 2010 (UTC)
Don't worry, we made sure they stated it or suggested it before jumping the gun. Klow 17:39, March 28, 2010 (UTC)
Just saying that apparently, the real quote is:
The first Portal takes place sometime after some of the events in Half-Life 2, but [some Portal 2 stuff goes here]
That means it happens simultaneously with Half-Life 2. ASBusinessMagnet 17:47, March 28, 2010 (UTC)
Then he says that it's maybe a year later. Klow 19:28, March 28, 2010 (UTC)
Something tells me that even Valve haven't thought it through this much. Only the fans really want to know when it is... Bramblepath 20:10, March 28, 2010 (UTC)


I think that adding separates sections for the 1970's, 80's, etc. is redundant, and it overcomplicated the article. I just think it should be as neat as possible. --Fireman V2 19:15, April 18, 2010 (UTC)

It doesn't overcomplicate. There can be a more logical way than to clearly separate every decade. Klow 08:31, April 19, 2010 (UTC)

Retroactive Continuity

Is listing all the retcons really needed? Could we maybe just link people to the retcons page? I'm not saying we should, just asking if it'sa good idea. -- 19:32, May 7, 2010 (UTC)

We really list a few rectons here. —Unsigned comment by Klow (talk)
What about sticking to the timeline that can be found from the game? Would that solve anything?-- 23:53, April 28, 2011 (UTC)
Combine the timelines. Assume some events repeat. History kinda does that all the time. Retcons are the last refuge of the unimaginative.ChrisMathers3501 15:11, August 19, 2011 (UTC)


The calendar from HL1 with the globe on it has december 8th as a sunday. The only Sunday, December 8th between 2000 and 2010 was in 2002, perhaps 200- was 2002?

Valve has already stated time and again, that HL1 happened in 200-, Just because a calendar from 2002 is hanging up doesn't mean that the year HL1 took place in wasn't 2009 or 2004.

The numbers don't line up, and some of the weeks have 6 days. The calendar can't be used to determine the year. 09:03, May 15, 2013 (UTC)

7 Hour War Month

Analysis of a newspaper clipping indicates that the 7 hour war took place in September, with the main note being that the month has a P in the second to last character position. (44, 2001 is arbitrary just to demonstrate the likeness). Another point of interest is that the day appears to be two digits long.

Also, the date format is inconsistent with a typical 200_ THE TIMES newspaper, as well as the entire front-page layout: This suggests that the date is some time after November 16, 2004 (HL2 release date), allowing for THE TIMES in-game to have changed their format after that date. —Unsigned comment by (talk)

300 years between Portal and Portal 2

I've heard that 300 years separate Portal and Portal 2, can anyone confirm it? ASBusinessMagnet 22:30, April 16, 2011 (UTC)

Actually, I believe this is the Announcer bugging: "you have been in suspension for nine nine nine nine nine (bugs out)" 99999 days = 273.8 years. ASBusinessMagnet 07:34, April 19, 2011 (UTC)
Was Valve "bugging," too? I believe they said the same thing, too.

GLaDOS says in Portal 2 (this is paraphrased) "You know the old formula. Comedy=Tragedy+time. And even though things aren't going well, you've been in stasis for almost 3 centuries"

Timeline Redo

Since Portal 2 came out and retconed everything, a lot of dates need to be changed. Aperture was founded before or during 1943, went from shower curtains to actual science by 1947, had a working portal device by 1952, and Cave Johnson died between 1981 and 1986. signed a random user whos gonna get yelled at for not signing in 8:40, April 21, 2011

Also, he apparently died from meteorite dust and not mercury poisoning. Webrunner 16:02, April 23, 2011 (UTC)

Cave Johnson Moon Rock Poisoning

During the game [Portal 2] towards the last of the "Old Aperture" Cave Johnson states himself that he was poisoned due to the grounding of Moon Rock into Gel, not mercury poisoning as stated in the wiki.

While this IS true, It has been stated Long before Portal 2 that Cave Johnson had contracted mercury poisoning from one of his shower curtain ideas. One of the symptoms of mercury poisoning is neuropsychiatric symptoms, Such as memory loss, Delusions and insomina. Or in Johnsons case, Thinking time flows backwards.

I say both are possible. Think of it like this. He gets mercury poisoning, then his kidneys shut down, he starts suffering the effects of the poison, and dying. This is a long, slow painful process. Then he gets moon rock poisoning, his kidneys shut down AGAIN, and now he's dying faster. In the little time that he has left, he goes on a combustible lemon rant and lays out his plan to put a consciousness into a computer. The story is confusing enough without going back and rewriting over every date, place and event.ChrisMathers3501 15:08, August 19, 2011 (UTC)

New portal 2 dates don't work with a lot of the old stuff....

I was looking at the trophy case in Portal 2 and Cave Johnson was awarded "Shower Curtain Salesman of 1943"; Aperture Science was awarded "Best New Science Company" by Science and Business Institute of America" and also awarded "Top 100 Applied Science Companies" by Mechanical Engineering World Journal in 1949. Knowing that the dates, old and new, came form Valve, how is this possible??

I'd assume that from now on we'll use the new dates and disregard the old ones. They're too contradictory to be able to coexist. SirMango 20:10, April 21, 2011 (UTC)
Is there a reason why dates like "1973: aperture is only producing shower curtains" When in game evidence shows that these are wrong. SajuukKhar 12:28, April 28, 2011 (UTC)

It didn't say "only." It said "mostly." That still works.ChrisMathers3501 15:03, August 19, 2011 (UTC)


The people over at this thread have made a good timeline based off of all the new portal 2 info. it would help with fixing timeline errors.

I tried to add this to the Half-Life Wiki timeline, but the next day it was changed back to normal. Why? It's pretty clear that BYCTWD was the big disaster day and not BYDTWD. --Therupertbob (talk) 22:00, December 20, 2012 (UTC)

Placement of Portal 2

What is the basis for Portal 2 being during the Half-life 2 events when Valve has pretty well confirmed Portal 2 takes place over 200 years after Portal 1?

I don't know, Valve is pretty much baseless on timeline issues. Last time I heard The Final Hour of Portal 2 mentioned Portal 2 takes place in 52,000 AD, which is WAY beyond acceptable limits. ASBusinessMagnet 14:38, April 27, 2011 (UTC)

In the Final Hours of Portal 2 is says that Portal 2 happened AT LEAST 50,000 years after Portal 1. That doesn't mean 52,000 AD, it could mean 9999999 AD.--Therupertbob (talk) 20:49, December 26, 2012 (UTC)

Bring your Cat To Work Day

Does everyone seem to forget that the Lab Rat comic shows Glados's takeover was on Bring Your Cat To Work Day and not Bring Your Daughter to work Day. SajuukKhar 14:53, April 26, 2011 (UTC)

Actually, Glados Mentions "Bring Your Cat To Work Day" After her activation and locking down the facility, Since she states "Since the Installation of my new Morality Core,..." Which was only installed after she was activated. Sorry to shoot down your theory.

Goes back and rereads comic. Hmm Glados talks about BYCTWD before shes killed everyone so.... If it was after she took over why are all the scientists acting super chill about her locking down the facility and going on with their normal day Oh and not dead. One would expect that they would all be freaking out or dead. Also can ou explain why a DoD contractor that got billions in funding every year was left to rot from like 1993 to 2003 when the BMI occurred. SajuukKhar 08:36, April 28, 2011 (UTC)

1990's: Chell attends BYDTWD at around age 10. Nobody dies. Later: Chell becomes an Aperture Science Research Associate, and the person doing the questioner is obviously not dead, because, as I stated before, on BYDTWD, nobody dies. 200X: The BYCTWD Incident occurs, Doug and Chell and the other test subjects survive, everyone else dies. There we go. Done. -- 21:17, December 19, 2012 (UTC)

Portal 2 Date

When playing the prologue of Portal 2 with closed captioning on, it says "nine nine nine nine nine ni-," implying at least 2739 years have passed since the previous time awoken. 00:46, April 28, 2011 (UTC)

I don't think we can assume that all the nines refer to any specific amount of time. It's possibly just because the computer is malfunctioning. Insisting on a connection to any specific amount of time is really just speculation.MattyG7 06:15, April 28, 2011 (UTC)

  • The Devs themselves have said it takes place around 300 years after Portal 1 how about takeing the people who make the games word instead? 20:52, May 19, 2011 (UTC)

In the Final Hours of Portal, it is revealed that Portal 2 occurs at least 50,000 years after Portal 1. And here is an unused sound file which is worth a look at: -- 21:21, December 19, 2012 (UTC)

Portal '98 date is wrong

About the repulsion gel as a dieting aid: -- 23:52, April 28, 2011 (UTC)

Proposal: Discredit as a source

I think at this point is no longer a reliable source given (A) Portal 2 has retconned pretty much everything, and (B) it isn't a source anymore at all. Valve isn't granting access to the tier3 login interface anymore - instead you get treated to an animated Christmas scene. That seems to me to indicate that they want you to play Portal 2 to get Aperture's history. GregBFM 07:45, May 9, 2011 (UTC)

As I mentioned in another subject on this talk page, my info about BYCTWD was changed back to the BYDTWD info, and would you look at the source: --Therupertbob (talk) 22:04, December 20, 2012 (UTC)

Portal 2 - the final hours

In this ebook, it was mentioned that the first Portal plays around the year 2010, which gives us a pretty good date to work with in the timeline. I just added it to the article very crudely, but I am no Wiki master (hell, I don't even have an account here) so I made a mess off of it. Someone, please clean it up.


Since when did Portal take place shortally after the 7 hour war. Didn't it take place shortally after the begining Half-life 2? If it didn't, Show me HARD PROOF from Valve. If there is none, then it's spectualation. Just pointing out something that I thought was Odd.Nurse Barbra 22:43, May 18, 2011 (UTC)

Nope, HL2 takes place in the 2020's while Portal takes place around 2010. I don't know the proof that HL2 takes place in 202- but Portal was said to be 2010 in Portal 2 - the final hours. .Wolfos

HL2 taking place in 202- is sourced in the article. "Gordon emerges from the darkness, nearly two decades removed from his last conscious thought." Here. HL1 is set in 200-, do the math. We chose dating that way for convenience. Valve will never give any dates anyway. ;) Klow 18:56, May 19, 2011 (UTC)

While I do know that Klow, I was asking for reference to the artical of "When Portal Takes Place", I already knew The BMI took place in 200- and HL2 took place in 202-, So thanks Wolfos, I just got "The final hours" on steam so this has been fixed in my mind. Thanks. Nurse Barbra 22:01, May 19, 2011 (UTC)

You got a reason for undoing my revisions, partner?

I made an edit to this page that reflected what was actually in the Opposing Force manual, allowing for the possibility that what it said doesn't need an unnecessary retcon to fit into the established continuity, NOT what somebody THINKS it should say. ChrisMathers3501 14:59, August 19, 2011 (UTC)

Found another Date

I was playing Portal 2 again this afternoon and I noticed that there is a date on the back of the Turret boxes, It looks like January 25th 2010. Screenshot:
Personal Lord Bhaal 2012-03-26 00001

Turret Something Date...

I'm not sure where this fits in but it looks like a sort of shipping label since there is a "Name and Signature of Purchasing Credit Card Holder" on the box as well... I have no idea how this would fit into the timeline but I thought it would interest you guys. --Lord Bhaal 22:42, March 26, 2012 (UTC)

Possible BYDTWD date?

Valve released a t-shirt advertising Bring-Your-daughter-to-work-day for August 5th, 1985. Is it just a reference to a previous BYDTWD or could it mean something?

Please note that the BYDTWD that GLaDOS took over on was the very first BYDTWD. From an unnamed user.

Please remember that Marc Laidlaw stated that they do not "get involved in issues of canonicity", that "canon itself is non-canon", and that there is "no official stance", "just the games" as they are. This means that no plot points are set in stone and that anything can change during the development of further games. I wouldn't take too much notice of any dates that valve uses unless it is stated in game. Also please remember to sign your messages. -- Adapool 06:08, July 14, 2012 (UTC)

Another Possible year for resonance cascade

A Wikia Contributor just made an edit suggesting the calendar is for the year 2002, not 2003 nor 2008 because December 1st is on a Sunday. Although I reverted the edit, I have put it here for further discussion purposes. -- Adapool 05:44, July 14, 2012 (UTC)


I just noticed that the character birthdays all assume that the characters are born before May 16. For example, let's say you're 27 on May 16, 2000 and are about to have your birthday on May 18, 2000. Technically, this is the 28th year that you have existed in, meaning that your birthday is not 1973, but 1972. This may be the case with Gordon Freeman. I am going to fix the page up now.

Therupertbob (talk) 19:41, June 13, 2013 (UTC)

200- and Speculation

There's an awful lot of speculation and assumption going on around the 200- area, to the point that there is a significant error margin. I'll deal with some of the sources used for dating and explain why they're circumstantial.

  • Shepard's notes in the Opposing Force manual, dated March, are as he is going through training. "Be ready in case it happens tomorrow" does not mean it actually did happen the next day.
  • Raising the Bar suggests the incident occurred in March, but this is cut content; it's worth in this article is minimal and it should not stand up on its own. We already know the time is 8:47, not 4:33.
  • The Black Mesa Hazard Course training schedule for May. This tells us that Gordon and Barney both underwent training in that month. It makes no mention of the date of the resonance cascade. It also makes sense that Gordon would undergo HEV training within a few days of starting work, so I'm not sure where the retcon comment on his start date is sourced from.
  • Calendars in Black Mesa. I suppose the staff could have some odd kind of organised practical joke going on, but it seems much more likely to me that the incident happened in December, not May as the article states.

Unless there are some sources I've missed (please point them out to me if I have), then there's horrendous speculation going on here that really makes the timeline a mess in the 200- section. If there's no reply to this in a few days to a week, I'm going to go about overhauling that section to remove it. AHadley 01:44, January 21, 2014 (UTC)

This is how I see it:
  • Shepard's Notes - March was retconned to May.
  • Raising the Bar - From what I see, the article doesn't state it as canon. Though it should be in the Trivia section.
  • Hazard Course Schedule - How could that document mention the Resonance Cascade if it had not happened yet? The retcon comment about Gordons arrival at Black Mesa is from Episode One, where Alyx says Barney and Gordon would race into Dr. Kleiner's office via the air ducts when he would lock himself out.
  • Calendars - I'd say they're out of canon now, after that retcon; but that would be just me speculating.
Also, I thought this [3] might interest you. - A-06 (talk) 13:20, January 21, 2014 (UTC)
Thanks for pointing out Episode 1 as the origin of the apparent retcon. That makes it seem like the community is set on the incident having been in May (even though there's no hard evidence for this) and are retconning Gordon's start date back in order to compensate. I can see how that would have happened - as a narratologist I've seen the same thing happen in other games myself; people don't like vagueness.
  • Shepard's Notes - Unless it's a specific retcon or Word of God proclaims it to be so, we shouldn't be assuming the OF manual is a retcon. There's no hard evidence for that.
  • Hazard Course Schedule - There's no reason the vent race can't have been somewhere between May (when Gordon joined) and December (when the evidence suggests the Resonance Cascade took place)
  • Calendars - I still have not yet found anything that suggests the retcon is anything more than a fan mistake.
  • Klow's post - Interesting. If Valve had never pegged the incident as Gordon's fist day, then it can't have occurred in May 15 even if that start date was later retconned. That appears to lend more credence to my suggestion. AHadley (talk) 18:01, January 21, 2014 (UTC)
So, the facts as they originally stood are thus:
  • March 15 - Shepard's training concludes and the HECU is placed on immediate standby. Source: OF manual
  • May 12 - Barney runs the Hazard Course. Source: PS2 manual
  • May 5 - 11 - Gordon joins Black Mesa Source: PS2 manual. "Immediately but no later than May 15" could be any of those ten days, but he is already working there by the May 11 memo
  • May 11 - The sample for a scheduled Anomalous Materials experiment is changed. Source: PS2 manual
  • May 16 - Gordon goes through the Hazard Course. Source: PS2 manual
  • December ## - Black Mesa Incident. Source: Calendar texture, presumably erroneous
  • Gordon and Barney ran vent races Source: HL2:EP1
  • The Black Mesa Incident was not on Gordon's first day. Source: Marc Laidlaw
That alone does not present evidence for retcon. Is there something else I'm missing? A Word-of-God somewhere? There's no reason the vent races can't have been between May and December. Both of the supplementary evidences seem to corroborate the suggestion that there was no retcon. AHadley (talk) 18:01, January 21, 2014 (UTC)

Half Life 2 Timeline Justification

First, the game begins with Day 1. This is merely a point of reference.

The next two nights are experienced by the player. Since the first night only occurs for the Ravenholm chapter and half of the BME chapter, this should be considered the approximate time a night should be. The end of Sandtraps, Nova Prospekt, and the first few minutes of Entanglement all happen at night. Since the night portion of Sandtraps takes roughly the same amount of time as the last half of BME to complete, this completes the first portion of the night. The day would then switch somewhere during the Nova Prospekt chapter (which is roughly the same length as the Ravenholm chapter), making Day 3.

Day 10 is one week after Day 3, the day Gordon left Nova Prospekt. Since Kleiner says "over a week", Day 10 is only an approximation for when Gordon reappears.

As A-06 helpfully pointed out, EP1 is a few days after HL2. This translates to approximately 3 days, making EP1 begin at Day 13.

If EP1 happened completely during Day 13, this would require all five chapters to be fit within the daytime. This cannot be possible. The only part of HL2 that has the most chapters in daytime would be Point Insertion to Black Mesa East. However, the first two chapters are very short compared to any one of Episode 1's chapters, requiring an extra day to be placed. The best spot would be the time Gordon is knocked out when leaving the Citadel, and when he and Alyx walk around the parking lot.

Using the same logic above, the three last daytime chapters of EP1, the time Gordon is unconscious, and the first chapter of EP2 is also too long to be daytime (especially without any sign of dawn or dusk!). Therefore, another day must be placed, which would be best between episodes.

The same logic applies for the entire timeline of EP2. The best spot to place another day would be the time Gordon spends underground, since all the other chapters are at daytime.I Sith (talk) 05:50, December 25, 2015 (UTC)

Well, first of all, the days passed "off-screen" are pure speculation, everyone could have a different concept of what "a few days" or "over a week" mean.
And you seem to think both Episodes span several days. This doesn't make sense in Episode One because Gordon and Alyx have very little time to escape before the Citadel explodes, so little time that it's not enough to escape, so little time that their best option is to stop it from exploding, so little time that we just can't place a day in there. Also, one of Alyx's lines seems to support this; "Thank god it's still day," right at the start of Urban Flight, meaning it is the same day.
It doesn't make sense in Episode Two either. Think about it, Alyx is almost dead, you can't spend another day looking for the extract. Besides, after healing Alyx, one of the vortigaunts tells her she'd been out for only "a matter of hours."
Now, it could be argued that there's a day between Ep1 and Ep2, but to me it seems unlikely; the start of Episode One is really early in the morning, but the atmosphere during the last map doesn't seem to be that much different (skybox, lighting), surelly just a few hours passed. While at the start of Episode Two it looks like it's late in the morning.
So I think we should stick to the days according to Gordon's point of view (hence the "Day X of Gordon's journey").
D1: Point Insertion | Black Mesa East
D2: We don't go to Ravenholm... | Nova Prospekt
D3: Entanglement / Anticitizen One | Dark Energy
D4: Episode One | Episode Two
A-06 (talk) 16:28, December 25, 2015 (UTC
Well, no response in a month; I'll revert it to the previous day layout.—A-06 (talk) 12:03, January 24, 2016 (UTC)
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