This game is so horribly addictive, make sure you get enough caffeine, you won't be able to set down your controller.
I started this game late one night and didn't end up going to bed until late in the morning. I find that unlike many games, it doesn't really leave you at any points where you really think you should stop, as it's just one big storyline, and your in the middle of it no matter where you are in the game.
This is why I like PS2 so much better than any other console, games like this one.
The story between humans and deimos, at war with one another. and Two brothers that don't even know each other, driven by hate for each others species. Strive to protect and fight for those they love... with only one goal in mind: To save the world!