Half-Life 2, voted game of the year in 2004. Counter-Strike: Source, one of the world's popular online action game. What would happened if you were to merge both of these? Simple, you would have a mod with Half-Life 2's storyline with Counter-Strike: Source's weapons and hence, Counter-Life 2 is born. Counter-Strike: Source's weaponary will be available for you when you purchase them from buy stations. 'Half-Life 2 is Single-Player, so where are they buy stations?' Well, all the buy stations are the Health and HEV stations you encouter throughout the game, strategically placed. Just go up to them and use them. Also, you can buy weapons while playing the game, just pressing the CT's or TER's buy menu buttons. Like in Counter-Strike: Source, each weapon cost a specific amount of cash.