In Steam, go to Store and search the specific mod you want, or search Half-Life 2. Then at the top of the page where it says All Items, change that to mods and you can browse different Half-Life 2 mods.
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.
Yes you do. Counterstrike: Condition Zero, however, is not a mod of Half Life, and therefore, does not need Half Life to acquire.
By co-op you mean mulitplayer. Yes. Half-Life 2: Deathmatch is only on PC.
If i remember deathmatch may cover it lost coast can't
Of course
You put them in C:Program Files\Steam\steamapps\sourcemods
Sadly, no. If you like zombies and stuff like that, Half-Life 2 MIGHT be for you. Otherwise, search for mods that remove that kind of stuff.
No it is a Xbox PC game
on sims 2 pc, boolprop mod youshift click.
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.
No, not in PS2, only the PC version of the game.
If you've got a PS3 or Xbox360, you might consider getting The Orange Box, which comes with Team Fortress 2, Portal, Half-Life 2 & Half-Life 2 episode 1+2. You might want to check online for the PC version.