The Tactile Dome is one of the coolest things I've ever done. It's a giant dome crammed with claustrophobic tunnels lined with different textures. Inside is pitch black. It's something that really can't be described, and should be experienced. A real show of what the PS2 can do.
Single player gets old fast, but multiplayer is extremely fun.
Easy to get into. Still just a combat game though. Ah yes, it is so sweet when you find yourself sitting in your room, avoiding the sun like a vampire, slurping on your fifth coke, and wearing your thumbs raw on a game that you just can't put down. And then you smile to yourself, because you know you're a filthy liar. A band of space pirates is attempting to steal a special class of mech on a remote planet colony, and will stop at nothing to get it.