I bought PREY Sunday afternoon and completed it monday evening, so longevity isnt much to speak about in this game (reminds me of King Kong). Part of this was not being able to put the controller down, and wanting to ‘get the alien scum’, the other part is that its an easy game to complete. Having said that PREY is a very cool game. Graphics are superb utilising the DOOM engine (you could be forgiven for thinking you are playing DOOM for the first 2 or 3 levels), the use of portals and gravity makes for some incredible flipping of the screen, in one part your character throws up because of the motion. The music and sound effects do the job adding to the tension, but are not overbearing. The story is what holds it all together, with the plot unfolding with its fair share of twists. The switches between ‘spirit’ and ‘real world’ make for interesting game play, with you having to use a combination of both to get access to pathways not open by normal means. Some parts of this game are genuinely disturbing, and some of the language Tommy uses is pretty down to earth, which actually makes the game more playable because he seems like a real person. Characters are well animated and textured, with some of the humans the aliens have conducted medical experiments looking pretty amazing, the good array of weapons and health packs around help you dispatch most of them pretty easily. All up a good game, I only found one graphic bug with an end of level monstor being invisible at times. The inclusion of multiplayer should mean many many more hours play well after you complete the single player game.