I missed this thread and have already posted in the reviews section, so mods feel free to move that or do whatever you feel is appropriate.
Anyway, despite a few graphical glitches, the game is worth the $20 that I paid for it. It is a first person shooter with a control scheme similar to halo, but you can roll around sonic style to get through levels quickly and it has live ammo like Oddworld Stranger. The enemies can take several shots before they go down, but it really depends on what kind of live ammo you are using. Of course, the more powerful ammo is in more limited supply. You can sneak up on enemies in stealth mode and kill them meelee style with your arm blade, but the applications of this have been limited for me sofar.
Like obscure, it is not necessarily easy to find. I checked 2 eb's and didn't notice any copies on the shelves, until I looked behind the register in the glass case and saw maybe 2 copies. I went to best buy originally, and they did not have any copies.