Very very good game with many features no other games have.
The story is nice, its a mystery from the get-go and you`ll have to watch till the very end to find out whats really going on.
The characters are great as well. Four in all (2 female and 2 male, booya) Each have a certain ability and must be used to continue forward in the levels. You control all four at a time (although sometimes they must split up) or what makes this game a LOT of fun is to get a buddy with you (me and my sis have beaten this game SO many times) with either two people on up to 4. Never tried four before, but I wish I could some time. Each also have a unique personality and have some great voice actors.
Action is pretty good, although you can never really DIE in the game (yep, you can die but you get brought back through some kinda machine that apparently makes another you). The bad guys are sometimes more funny then deadly (although some can be freakin scary).
What is really neat is that you can be in 3rd person OR first person at a click of the R3 button. (Analog stick). And to switch to a person just press the up,down,left,right on the (non-analog) buttons.
This games real gem is problem solving, thats the key. You`ll be pulling your hair our at times trying to figure out what to do next, and then suddenly you`ll find it and be like, "why didn`t I see that at first!"
The puzzles are really really good.
Graphics are on the ok side, not great but not awful.
Although I must warn of certain glitches, at times. If your PS2 disc is pretty scratched then you`ll get some interesting situations. Also, sometimes you`ll die in the oddest ways, but this I find to be SO hilarious that I am almost looking for the ways that it works. But its not so bad that it gets in the way.
The VS mode is really cool, you`ll enjoy it for a PS2 game. Not anything to run to in this day and time when we have Halo 3 and such.
Altogether this game is a AWESOME PS2 game (I am surprised the PS2 can take so much info) and a altogether great game and you can find it really cheap, so get a copy and a friend or two (or three) and have fun with Project Eden.