Counter-Strike: Source rebuilds the phenomenal Half-Life mod on the Half-Life 2 "Source" engine. Also included are updated versions of "Half-Life: Deathmatch" and the World War II-themed "Day of Defeat." This retail edition is distributed by Electronic Arts.
Editor's Note: Although Counter Strike: Source offers a number of single-player modes and multiplayer LAN support, a connection to the Internet is required to install and play the software. Users must set up an online "Steam" account, hosted by developer Valve, in order to "unlock" the game content they install from the disk(s).