I remember playing this game on a demo once, after that I HAD to buy the full game. Either single or multiplayers are available, as you control your man in several arenas unlocking doors and worming in and out of different levels of machinery using several choices of weapons. The game is non-stop blasting action, but does take some sort of strategy when focusing on access to the next level. I don't remember any blast-em-up platformer being so fun. This game is one of a kind, and one of my fondest memories of PS gaming. Definitely worth a play, and can be highly addictive. I'm suprised that this game didn't get better reviews, because it is action packed. I can't believe this game was released 10 years ago. If I had the chance, I'd definitely give it another game. It's quite fun in multiplayer as you have to help each other out and work as a team to blast through the action-packed levels full of chaos to unlock puzzles and gain greater weapons and machines. This game is very similar to the old PC/Amiga game The Chaos Engine, but is full of much more madness and grips you much more with the constant bombardment of rival goons and machines.