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Changes: Advanced Knee Replacement

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File:Aperture clipboard Knee.png|Clipboard sheet featuring the Advanced Knee Replacement specs.
  
File:Aperture clipboard Knee.png|Clipboard sheet featuring the Advanced Knee Replacement specs.
 
File:Two clipboards.jpg|Two clipboards in an Aperture Laboratories office, including one about the Advanced Knee Replacement.
  
File:Two clipboards.jpg|Two clipboards in an Aperture Laboratories office, including one about the Advanced Knee Replacement.
  +
File:Jumping from high ledges.jpg|The diagram showing what happens if a Test Subject jumps without Advanced Knee Replacement.
 
</gallery>
  
</gallery>
   

Revision as of 10:26, 18 April 2011

This is a safe article.
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 This article is within the scope of the Portal Project, a collaborative effort to improve articles related to Portal and Portal 2. See the project page for more details about the article status.

 
"Ewww, what's wrong with your legs?"
―GLaDOS's Curiosity Core[src]
 

The Advanced Knee Replacement is a technique used by Aperture Science to prevent Test Subjects from injury from huge drops by lessening the impact.

Overview

  • The device consists of two prostheses completely or partially replacing the knee, partially tied to the Test Subject's calves, and prolonged with two flexible curved pieces of metal going under the Test Subject's heels, acting as springs.

Behind the scenes

Assassin springs

Detail of the Combine Assassin's heel springs.

  • The Advanced Knee Replacement was added into Portal due to disbelief by playtesters that Chell could survive the drops she was subject to, particularly those that involved falling recursively through portals.[3]
  • According to Matt Charlesworth, the team was not sure whether to keep the Advanced Knee Replacement in Portal 2. He stated that some team members were attached to it, and that some were not, so they experimented what to do with them, or how to replace them,[4] until they decided to replace it with a variant, the Long Fall Boot.

Trivia

  • The sound files for the Advanced Knee Replacement footsteps use the name "future shoes".

Gallery

Portal

Portal 2

List of appearances

References

  1. ↑ Portal 2: Lab Rat
  2. ↑ Playable Half-Life 2 Beta
  3. ↑ Portal commentary
  4. ↑ Redesigning Portal: Valve’s Artist Speaks on Game Informer
Imagecat Technology
Aperture Science 1500 Megawatt Heavy Duty Super-Colliding Super Button • Advanced Knee Replacement • Aerial Faith Plate • Announcement System • ATLAS and P-body • Borealis • Core Input Receptacle • Crusher • Edgeless Safety Cube Receptacle • Edgeless Safety Cube • Emergency Intelligence Incinerator • Excursion Funnel • Frankenturret • Futbol (cut) • GLaDOS • Hard Light Bridge • High Energy Pellet • Jerry • Laser Field • Long Fall Boot • Material Emancipation Grill • Military Android • Mobility Gels: Conversion Gel / Propulsion Gel / Repulsion Gel • Multitasking Arm • Nanobot • Panel • Party Escort Bot • Personality Construct • Pipe Network • Pneumatic Diversity Vent • Cube Button • Radio • Reassembly Machine • Relaxation Vault • Robot Enrichment • Robot Worker • Scaling Cube • Security Camera • Shredder • Speaker System • Stasis Chamber • Sticking Gel (cut) • Switch • Teleportation • Thermal Discouragement Beam • Unstationary Scaffold • Victory Lift • Vital Apparatus Vent • Weighted Pivot Cube • Weighted Storage Cube • Wheatley
Black Mesa Anti-Mass Spectrometer • Battery • Black Mesa Announcement System • Charger • Cleansuit • Delivery cart • Emergency flare (cut) • HEV Suit • Holographic Assistant • Long Jump Module • Medkit • The Mesa Times • MTM 8 • Oxygen Bottles (cut) • Powerup Bottles (cut) • Retinal scanner • Satellite Delivery Rocket • Security Card (cut) • Armor Vest and Helmet • Teleportation • Vehicles • Weapon Box • Weapons
Black Ops Cloaking device • Weapons
Combine Battery • Breencast • Charger • Citadel Core • Citadel • Barricade • Binoculars • Binoculars (cut) • Bunker • Camera • Cell • Combine Assassin tank (cut) • Combine Big Momma Pod (cut) • Confiscation Field • Dark Energy • Depot • Dispenser • Door lock • Door Tower (cut) • Dr. Breen's Private Reserve • Elevator • Emergency flare • Emitter • Energy Ball • Field Bridge • Force Field • Heavy Door • Heel Springs (cut) • Interface • Light • Medkit • Memory Replacement • Monitor • Overwatch Voice • Power Generator • Restrictor • Security Door • Smart Barrier • Supply Crate • Suppression Field • Teleportation • Television • The Terminal • Vehicles • Watchtower • Weapons • Vorti-Cell (cut)
Resistance Borealis (cut) • Car battery • Communication • Antlion Detector • Dog • EMP Tool • Fire Extinguisher (cut) • Generator trailer • Drawbridge • Retinal scanner • Supply Crate • Teleportation • Television • Transponder • Vehicles • Weapons • White Forest rocket
Xen Healing Shower • Thumper
HECU Powered Combat Vest • Radio • Tactical Map • Welding Torch
Other Garden Gnome
Imagecat Aperture Science
Personnel Caroline • Chell • Desk Employee • Henry • Cave Johnson • Doug Rattmann • Greg • Mel (cut) • Test Subject • Test Subject 042 • Test Subject 234 • Minor Aperture Science employees
Technology 1500 Megawatt Heavy Duty Super-Colliding Super Button • Advanced Knee Replacement • Aerial Faith Plate • Announcement System • Borealis • Core Input Receptacle • Crusher • Edgeless Safety Cube • Edgeless Safety Cube Receptacle • Emergency Intelligence Incinerator • Excursion Funnel • Futbol (cut) • Handheld Portal Device • Hard Light Bridge • High Energy Pellet • Laser Field • Long Fall Boot • Material Emancipation Grill • Mobility Gels: Conversion Gel / Propulsion Gel / Repulsion Gel / Sticking Gel (cut) • Multitasking Arm • Pipe Network • Pneumatic Diversity Vent • Panel • Cube Button • Radio • Reassembly Machine • Relaxation Vault • Security Camera • Scaling Cube • Shredder • Speaker System • Stasis Chamber • Switch • Teleportation • Thermal Discouragement Beam • Unstationary Scaffold • Victory Lift • Vital Apparatus Vent • Weighted Pivot Cube • Weighted Storage Cube
Robots Robot Worker • ATLAS and P-body • GLaDOS • Grady • Jerry • Military Android • Nanobot • Party Escort Bot • Personality Construct • Robot Enrichment • Wheatley
Weapons Bomb • Hover Turret (cut)
Sentry Turrets Animal King • Frankenturret • Defective Turret • Oracle Turret • Rocket Sentry • Sentry Turret • Turret Opera
Locations Borealis • Employee Daycare Center • Enrichment Center • Enrichment Shafts: Co-op Test Shaft / Test Shaft 09 • Extended Relaxation Annex • Extended Relaxation Center • Central AI Chamber • Hub • Incinerator Room • Neurotoxin Generator • Testing Tracks: GLaDOS' Testing Track (Portal) / GLaDOS' Testing Track (Portal 2) / Wheatley's Testing Track / Cooperative Testing Courses • Turret Manufacturing
Other Aperture Science Collaborative Disposition Test • ApertureScience.com • Cake • Enrichment Center Test Subject Application Process • GLaDOS' screen images • Hoopie • Karla the Complainer • Mantis Man
Imagecat The Combine
Leaders / key figures 314 URB-LOC 0017 Advisor • Barn Advisor • Combine Advisors • The Consul (cut) • Vance (cut) • Wallace Breen
Minor members Animal (cut) • Barney Calhoun • Mambridge (cut) • Peters (cut) • Unnamed Scientist
Humanoid units Alien Assassin (cut) • Alien Soldier (cut) • Assassin (cut) • Charger • Civil Protection • Conscripts (cut) • Cremator (cut) • Elite (cut) • Grunt • Ordinal • Sniper • Soldier • Stalker • Suppressor • Zombie Assassin (cut)
Synth units Synth • Advisor Pod • Attack Synth (cut) • Crab Synth • Dropship • Guard (cut) • Gunship • Hunter • Mobile Mine (cut) • Mortar Synth • Sacktick (cut) • Shield Scanner • Strider • Super Soldier (cut) • Synth Elite Soldier (cut) • Tbot1 (cut) • Unidentified cut Synth (cut) • Wasteland Scanner (cut)
Mechanical units City Scanner • Manhack • Combot (cut)
Weapons AK-47 (cut) • Autogun • Ceiling Turret • Desert Launcher (cut) • Emplacement Gun • FIM-92 Stinger (cut) • Flare Gun • GR9 (cut) • Guard Gun (cut) • Grenade • Ground Turret • Headcrab Shell • Heavy Shotgun • HK-707 (cut) • Hopper Mine • Hopwire Grenade (cut) • Hunter-Chopper Bomb • Immolator (cut) • Incendiary Rifle (cut) • Laser Tripmine • Launcher (cut) • MK3A2 Grenade • MP5K (cut) • MP7 (cut) • Overwatch Sniper Rifle • Overwatch Standard Issue Pulse Rifle • Pulse SMG • Pulse weapons • Rollermine • Sentry Gun • Shotgun • Sniper Rifle (cut) • SPAS-12 • Stun Baton • Suppression Device • USP Match • Wall Turret (cut) XM29 OICW (cut)
Vehicles Advisor Platform • AirEx Truck (cut) • Armored Personnel Carrier • Hunter-Chopper • M2A3 Bradley (cut) • Merkava (cut) • Razor Train • School Bus (cut) • SWAT Truck (cut)
Technology Advisor Container • Assassin tank (cut) • Barricade • Battery • Big Momma Pod (cut) • Binoculars (cut) • Breencast • Bunker • Camera (cut) • Cell • Charger • Citadel • Citadel Core • Confiscation Field • Dark Energy • Depot • Dispenser • Door lock • Door Tower (cut) • Dr. Breen's Private Reserve • Elevator • Emergency flare • Emitter • Energy Ball • Fabricator • Field Bridge • Force Field • Heavy Door • Heel Springs (cut) • Interface • Light • Medkit • Memory Replacement • Monitor • Overwatch Voice • Power Generator • Restrictor • Security Door • Smart Barrier • Supply Crate • Suppression Field • Teleportation • Television • The Terminal • Vehicles • Vorti-Cell (cut) • Watchtower
Locations APC garage • Citadel • Citadel Core • City 8 • City 11 • City 12 • City 13 • City 14 • City 15 • City 16 • City 17 • City 24 • City 27 • City 17 Trainstation • Combine Overworld • Depot • Gate 5 • Nova Prospekt • Overwatch Nexus • Technical Trainstation • See cut locations
Other Anticitizen • Citizen • Overwatch
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