Mods















The Half-Life series spawned countless mods, among which many that became highly popular in the Half-Life gaming community. Some original mods, such as Counter-Strike, Team Fortress, Day of Defeat, Ricochet, The Ship and Alien Swarm (originally a mod for Unreal Tournament 2004) have been "adopted" by Valve and made into commercial games. However some mods such as Garry's Mod having been turned into commercial games remain independent. Some mods are also based on cut content, featured in the released files for Half-Life, and in the leaked files for Half-Life 2.

Some of these mods include minor or major alterations to the original game, others consist in a total conversion, i.e. made from scratch, only using the existing engine, models, sounds, textures, etc. The non-commercial mods can be downloaded for free, as they are not licensing the engine.

Notable mods
The list is incomplete; feel free to complete it with other notable mods.

GoldSrc

 * Absolute Redemption
 * Afraid of Monsters: Directors Cut
 * Counter-Strike
 * Azure Sheep
 * Black Ops
 * Blue Shift: Reassignment
 * Cat-Life
 * Cry Of Fear
 * Day of Defeat
 * Deliverance
 * Half-Life: Visitors
 * Half-Life: Zombie Edition
 * Natural Selection
 * PARANOIA
 * Hazardous Course 2
 * Peaces Like Us
 * Poke646
 * Point of View
 * Ricochet
 * Scientist Slaughterhouse
 * Sven Co-op
 * Sweet Half-Life
 * Team Fortress
 * The Ship
 * The Specialists
 * They Hunger
 * USS Darkstar
 * Wanted
 * Peaces Like Us
 * Christmas Life
 * Prison
 * Operation Nova

Source

 * 1187
 * Age of Chivalry
 * Awakening
 * Black Mesa
 * Causality Effect
 * City17: Episode 1
 * City 7: Toronto Conflict
 * Coastline to Atmosphere
 * Combine Destiny
 * DayHard
 * Dear Esther
 * Dino D-Day
 * D.I.P.R.I.P.
 * Dystopia
 * FakeFactory's Cinematic Mod
 * Garry's Mod
 * Eclipse
 * Eternal Silence
 * Flipside
 * GoldenEye: Source
 * Guard Duty
 * Half-Life 2: Capture the Flag
 * Half-Life 2: Riot Act
 * Half-Life 2: Short Stories: Human Error
 * Half-Life 2: Wars
 * Insurgency: Modern Infantry Combat
 * MINERVA
 * Missing Information
 * Mission Improbable
 * Mistake of Pythagoras
 * NeoTokyo
 * Nightmare House 2
 * No More Room in Hell
 * Obsidian Conflict
 * Operation Black Mesa
 * Opposing Force 2
 * Perfect Dark: Source
 * Portal 1.5
 * Portal: Prelude
 * Portal: The Flash Version MapPack
 * Tier 3 (Portal)
 * Blue Portals
 * Gamma Energy
 * Raindrop
 * Research and Development
 * Rock 24
 * Silent Escape
 * SMOD
 * SMOD: Tactical
 * SourceForts
 * Synergy
 * Star Trek: Enterprise - Temporal Cold War
 * The Citizen
 * The Stargate Mod
 * Titan: XCIX
 * Underhell
 * Water
 * Weekday Warrior
 * Zeno Clash
 * Zombie Master
 * Zombie Panic! Source