Players battle terrorists and try to rescue high-profile hostages through 12 levels of strategic covert action in Elite Force: Unit 77. Some of the world's pre-eminent figures from the scientific, entertainment, and industrial sectors have been kidnapped, and gamers must alternate between four different characters to free the hostages and save the world from annihilation. Players switch between a sniper, an explosives expert, a hacker, and a heavy-weapons gunner, using each character's special abilities to forge their way though three harrowing scenarios.