Counter-Strike is a first-person shooter in which players join either the terrorist or counter-terrorist team (or become a spectator). Each team attempts to complete their mission objective and/or eliminate the opposing team.

Counter-Strike: Source (abbreviated CS:S) is a first-person shooter video game developed by the Valve Corporation. It is a complete remake of Counter-Strike using the Source game engine.

Call of Duty 2 is a historic first-person shooter video game and the second installment in the critically acclaimed Call of Duty series of games.