A hostile alien force has invaded Earth and forced everyone into captivity. As Angel Sanchez, you must guide a group of rebels against the Catteni aliens. This third-person action-adventure game is stealth based and allows players to control Angel and two other team members. They can be controlled as a group, or characters can be placed in strategic locations, depending on the mission. Players explore the environment and gain clues through object-based puzzle solving with cascading events. Dynamic lighting aids in stealth as players can retreat into the shadows then step into action at the right time. Seven hundred motion-capture moves help provide smooth actions.