Though the game has it's peaks it often seems like a chore to play.
The main negative point I found in this game was the extraordinarily easy difficulty. It is impossible to actually die in this game. Each time you die you go to an annoying 'spiritwalking' mode for about 20 seconds and then you find yourself up and running again exactly where you were when you died.
Another negative point is the annoying mind games. The game is packed full of mind games in every single level and I only found one interesting one in the game. Usually when you come to these mind games you think 'oh here we go another boring stepping stone to delay my progress in the game'
Artificial intelligence is another issue in this game. Seriously have you ever met an alien race that is fluent in English but has gibberish handwriting? No I didn't think so either.
These issues go together as the core backbone of a boring game. This makes the game uninteresting and leaves and overall chore like experience.
The fun doesn't start until the 16th mission. But in this dying stage of the game I found myself begin to enjoy it. A late kick off but it means Prey saved itself from a much lower score. In these last missions you find yourself using a large variety of weapons and blasting through a large variety of enemies. With much less mind games and and gameplay improvement you start to find yourself having fun. But then it's over and Prey has left a small hole in your heat.