Game availability keywords

This is a draft page. It is a work in progress open to editing by anyone.
Remember to check for any notes left by the tagger at this article's talk page.

Tip:If unsure what games an entity is available in check dump_entity_sizes page which lists all for each game. (entity being listed doesn't guarantee it's fully supported for the given game)

Meaning of 'available in all // games'

This is referring to all Valve games as documenting Valve software is main purpose of this wiki and there can be hundreds of games made on those engines that can change many features as they need.

Meaning of since when used with games

• (in all games since ) - means available in Half-Life 2 and all Source Valve games released afterwards
• (in all games since ) - means available in Left 4 Dead and all Source Valve games released afterwards (see Source games in the release order ↓)

Meaning of since when used with engine branches

• (in all games since ) - would mean all Valve games except Source SDK Base 2006 and earlier, aswell as mods based on previous version of Source.
• (in all games since ) - ^[Todo]
• (in all games since ) - introduced in which means it's currently also in all Valve games, except Left 4 Dead engine branch-derived (basically up to ) games/mods and Source 2009 or earlier.
• (in all games since ) - Introduced in and also in .

Meaning of in

• (in ) - All Source 2013 branch games (, , and )
• (in ) - Half-Life: Source, Half-Life 2, Half-Life 2: Lost Coast, Half-Life 2: Episode One, Half-Life 2: Episode Two and Portal and any mods based on it.
• (in ) - Counter-Strike: Source, Half-Life 2: Deathmatch, Half-Life Deathmatch: Source, Day of Defeat: Source and Team Fortress 2 (all pre-2025) and any mods based on it.
• (in ) - Counter-Strike: Source, Half-Life 2: Deathmatch, Half-Life Deathmatch: Source, Day of Defeat: Source and Team Fortress 2 (all post Feb 18, 2025 engine update) and any mods based on updated Source SDK Base 2013 - Multiplayer (2025).

Source games in the release order

See also:  Source/Engine versions

Game	Starting branch	Current branch
Counter-Strike: Source	Source 2004	Team Fortress 2 branch
Half-Life: Source	Source 2004	Source 2013 Singleplayer
Half-Life 2	Source 2004	Source 2013 Singleplayer
Half-Life 2: Deathmatch	Source 2004	Team Fortress 2 branch
Day of Defeat: Source	Source 2004	Team Fortress 2 branch
Half-Life 2: Lost Coast	Source 2004	Source 2013 Singleplayer
Half-Life Deathmatch: Source	Source 2004	Team Fortress 2 branch
Half-Life 2: Episode One	Source 2006	Source 2013 Singleplayer
Half-Life 2: Episode Two	Source 2007	Source 2013 Singleplayer
Portal	Source 2007	Source 2013 Singleplayer; slightly older version than
Team Fortress 2	Source 2007	Team Fortress 2 branch
Left 4 Dead	Left 4 Dead engine branch	Left 4 Dead engine branch
Left 4 Dead 2	Left 4 Dead engine branch	Left 4 Dead engine branch
Alien Swarm	Alien Swarm engine branch	Alien Swarm engine branch
Portal 2	Portal 2 engine branch	Portal 2 engine branch
Counter-Strike: Global Offensive	CS:GO engine branch	CS:GO engine branch

Source SDK bases

1. Source SDK Base 2006 (also known as just "Source SDK Base")
2. Source SDK Base 2007
3. Source SDK Base 2013 - Singleplayer
4. Source SDK Base 2013 - Multiplayer (original version on branch, first released in 2014, available under previous2021 beta branch)
5. Source SDK Base 2013 - Multiplayer (2025 version, based on Team Fortress 2 branch)

See also

• Template talk:Since
• dump_entity_sizes - to check entity availability
• {{Hierarchy}}