In April 2000, Valve acquired the rights to the fan-made modification "Counter-Strike". After some cooperation between the original team and Valve's developers, Valve sold the game in retail, retitled "Half-Life: Counter-Strike". Set in various locations around the world with little connection to the events of the main "Half-Life" story, the game is a multiplayer shooter in which players assume the roles of members of combating teams of the governmental counter-terrorist forces and various terrorist militants opposing them. Due to originally being a mod of "Half-Life", the game shared several assets with the 1998 game, including Black Mesa containers, vehicles, and scientists, with the Black Mesa logos visible in several maps in the retail version implicitly setting them in the same universe. It was bundled with "Half-Life" in many subsequent packages, including "Half-Life: Platinum Pack" and "Half-Life: Platinum".