Counter-Strike 1.6 is a MOD for Half-Life that is set in a teamplay mode.
Steam is Valve's new way of getting games into your hands ASAP. Games like Half-Life, Counter-Strike, and Counter-Strike Condition Zero are all being made available through Steam.
Steam games are automatically kept up-to-date with the latest content and revisions. Steam also includes an instant-message client which even works while you're in-game.
At its core, Steam is a distributed file system and shared set of technology components that can be implemented into any software application.
· Play the latest Valve games (like Counter-Strike 1.6 )
· Get automatic updates (no more patching!)
· Chat with friends, even while you play
· Find the best servers & find your friends' games
· Receive Steam-Only special offers