its not so original as they say bu its still good
like prey and soul reaver but the idea of the spirit walk and death walk is the
same as the one in soul reaver. And the portal gameplay is similar as the slipgate gameplay in Quake 1. The death walk also makes the game too easy becuase you cant die, its like you were playing in god mode. The game
is also very short. But prey still a game with very good graphics and its very entretaining.