Stay away unless you are dying for an FPS experience on your PSP.
The main campaign lasted for about...5-8 hours. That is amazingly short. The random map generation isn't as interesting as it sounds. Its basically just moving around some staircases or moving the door to the other side of the room.
The gameplay is easy to forgive considering the lack of a second analog stick and the game is relatively easy to play once you get used to the controls.
EVERYTHING in this game is so unoriginal that you will want to bash your PSP into the wall. The bugs are from starship troopers, the robots from every sci-fi show there is, the soldiers are just complete crap and there isn't a single line of voice acting that i can hear besides the mutterings of an ugly soldier. I mean there really couldn't be a more unoriginal game!
Sound-wise nothing to look down upon but nothing special.
Graphics are really the only thing going for this game. Everything looks crisp and the digital world becomes realistic with a great presentation. Now if you go into everything else...
The value of this game is atrocious. They try to keep you involved more with the random map generator but really its just a piece of crap. There are some weapons that need to be unlocked in the infinity mode but getting them seems more like a chore than a fun game.
Overrall I was VERY disappointed with this game. At first glance it seems like the perfect game for the PSP but after a while this just fails the deliver except for the most hardcore fans of first person shooters who want a portable version that doesn't have bad graphics.