An older game but gets good reviews - Black for the PS2 is now just £5.99 delivered @ Hmv!
Join the world's most brutal strike force. The Black tactical squad operates under the cloak of complete anonymity and deniability to protect the US from threats foreign and domestic. It answers to no one, allowing it to carry out brutal and overt operations around the globe. From manipulating politicians to controlling intelligence networks and militaries, Black operatives are trained at the highest level in psychological warfare, espionage, and lethal arts. Go deep into the world of clandestine warfare as you use any means necessary to get the job done.