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
 * Counter-Strike
 * Azure Sheep
 * Black Ops
 * Blue Shift: Reassignment
 * Cat-Life
 * Day of Defeat
 * Deliverance
 * Half-Life: Visitors
 * Natural Selection
 * PARANOIA
 * Peaces Like Us
 * Point of View
 * Ricochet
 * Scientist Slaughterhouse
 * Sven Co-op
 * Sweet Half-Life
 * Team Fortress
 * The Ship
 * The Specialists
 * They Hunger
 * USS Darkstar

Source

 * Age of Chivalry
 * Awakening
 * Black Mesa
 * Causality Effect
 * City17: Episode 1
 * City 7: Toronto Conflict
 * Coastline to Atmosphere
 * Combine Destiny
 * DayHard
 * Dear Esther
 * Dystopia
 * FakeFactory's Cinematic Mod
 * Garry's Mod
 * Eclipse
 * Flipside
 * GoldenEye: Source
 * Guard Duty
 * Half-Life 2: Capture the Flag
 * Half-Life 2: Riot Act
 * Half-Life 2: Short Stories
 * Half-Life 2: Wars
 * Insurgency: Modern Infantry Combat
 * MINERVA
 * Missing Information
 * Mistake of Pythagoras
 * NeoTokyo
 * Obsidian Conflict
 * Operation Black Mesa
 * Perfect Dark : Source
 * Portal: Prelude
 * Portal: The Flash Version MapPack
 * Raindrop
 * Research and Development
 * Rock 24
 * SMOD
 * SourceForts
 * Synergy
 * Star Trek: Enterprise - Temporal Cold War
 * The Citizen
 * The Stargate Mod
 * Weekday Warrior
 * Zeno Clash
 * Zombie Master
 * Zombie Panic! Source