much more
Yes. If you have a Source game like Half-Life 2, HL2 Deathmatch, Counter-Strike Source, Left 4 Dead, Portal, Team Fortress 2, etc. you can play Half-Life 2 mods.
Team Fortress 2 was initially a Quake Mod (Team Fortress), for Capture the Flag and Team Deathmatch
Half-Life, Half-Life: Blueshift, Half-life: Opposing Force, Half-life: High Definition pack (might not classify as a game), Half-Life: Source, Half-Life 2, Half-Life 2: Episode 1, and Half-Life 2: Episode 2. Eight games total not including countless mods created by fans that you can download for free on moddb.com and fileplanet.com. Other games by Valve software include Left 4 Dead, Left 4 Dead 2, Portal, Portal 2, Counter Strike, Counter Strike: Source, Team Fortress, Team Fortress 2, and Alien Swarm. Another Half-Life game would be Half-Life: Decay. You might also be able to count Half-Life Deathmatch and Half-Life 2 Deathmatch.
Some games on Steam do. These games include: Day of Defeat: Source Left 4 Dead 2 Team Fortress 2 Half-Life 2 Portal Half-Life 2: Episode 2 Counter-Strike Source Alien Swarm ( Free on Steam) Half-Life 2:Episode 1 Left 4 Dead Half-Life 2: Deathmatch
The Orange Box games collection, which includes Half Life 2, Portal and of course Team Fortress 2
No, Garry's mod only runs through steam and at the current time only supports: Half-Life: Source Half-Life 2 & Episodes 1 & 2. Half-Life 2: Deathmatch & Lost Coast. Day of Defeat: Source. Counter-Strike: Source. Team Fortress 2. Left 4 Dead. Portal.
Team Fortress 2 and Half Life 2 are both games made by Valve Inc, the creators of Steam.
Half Life 2 Half Life 2: Episode 1 Half Life 2: Episode 2 Portal Team Fortress Hope this helps ;)
yes along with half life 2 half life episode 1 and 2 and portal in the orange box
Team Fortress 2 uses the source engie, which is developed by Valve.
There are 3 different gametypes available; Deathmatch, Team Deathmatch and Capture the Flag.
Valve Software, the makers of Counter-Strike, Team Fortress 2, Portal and Left 4 Dead.