"Geist" is an FPS,Action-Horror game released in 2005. Since I'll admit I am a bit lazy, I am going to copy and paste bits and pieces of "Wikipedia's" summary of the storyline. The game is set in the year 2005 and is about John Raimi a civilian scientist and a member of a counter-terrorism team sent to investigate the Volks Corporation. The team, called CR-2, sent Thomas Bryson, Raimi's best friend, to Volks Corporation for an undercover operation months earlier and now they have to get him out of there. After meeting up with Bryson, the alarm goes off and CR-2 is forced to battle their way out. On the way out, a monster appears and violently kills one of Raimi's squad members. At the end, one of the agents seemingly becomes possessed and kills the rest of the team with the exception of Raimi, who just gets badly wounded, and, as the latter later finds out, Bryson. It is not revealed what happens with the possessed agent though. Raimi is captured and his soul is torn from his body by an experimental machine. Soon after, Alexander Volks himself puts Raimi into a machine to brainwash him, so he will become a new soldier for Project Z. However, the spirit of a young girl named Gigi blows the machine's power to save Raimi. She then teaches him the basics of being a ghost and Raimi sets out to get his body back and save Bryson. His new ghost abilities (possessing other humans, animals and even inanimate objects) immediately prove to be essential if he wants to succeed Short summary you're a ghost who possesses people and objects on a mission to find his body.




Gameplay Screenshots:



















Gameplay: youtube.com/watch?v=_Bqv4I0eLvo


Well that's all I've got. Oh wait, one last thing that is a bit of a set back....It's kinda an exclusive "Gamecube" title.
But you could probably find it on an emulator or something.