Are you kidding me, Half life 2 is not even a multiplayer game. Ofcourse you can't, but there is a separate game called Half life 2 deathmatch. That is basicly hl2 multiplayer but i don't know if it is for PS3.
There aren't many maps for HL2, but if you want to have some fun with the game, download GarrysMod, also on steam.
Not specifically. You need a VALVE game to play Garry's Mod, one of which could be Half-Life 2.
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.
You can't use any firearm as a melee weapon in Half life 2.
The Combine are a mysterious bunch, not much is hinted at in the game. The soldiers no doubt work for the Advisors (Shu'ulathoi) but it is unknown who commands the Advisors. There could be some big Avisor boss dude like the Nihilanth from Half Life 1. Or perhaps another species controls them. Lets hope HL2 EP3 tells us more about them (if it is ever released).
im guessing this is an old question, HL2 came out quite a long time ago
You can find out in HL2 Ep 1 !SPOILER! She was saved by vortiguants
Eh? how is it possible to have HL2 installed on you computer but not on steam? The short answer is no. But you're welcome to try clicking "add a game in the bottom left corner of your library and adding half life 2 as a game.
A computer that was bought at least after 2006 to run Half-Life 2 aka HL2
Yes, they are all different games; episode 1 follows on from hl2, and episode 2 from one.
its is short for half life 2 (there are hl1 hl2 ep 1 and ep 2) =D they are all on steam search on google steam click on download steam download it and u can buy games off it it is very good i have it