Deus Ex definitely is, even if it's your first time trying the series. If you're a fan of action RPGs it really is a must buy.
edit - To be clear I'm talking about Human Revolution, since this is the PS3 board I assume that is the one you're talking about. If it's the original on the PC i'd still recommend, but definitely look up some videos first. The story and gameplay has aged well for the most part, but the graphics and UI/controls show their age.
Yes I was talking HR as far as Deus Ex was concerned. I was thinking of Singularity since I've been looking for a random fun shooter play as well. It looked interesting at first glance. --- Go, then.....there are other worlds than these. psn: jcvdismyhero
DX : HR sits in the middle of the three games for me. It's very very good but no quite the level of the original even now.
Singularity I thoroughly enjoyed and would recommend a playthrough (guessing you're on about single player) but not sure at $15 (about £10 right? You're strange foreign money confuses me) as it's quite short, definitely worth a rent though if you can get it. --- OFFICIAL BOY WHO WAITED OF THE DOCTOR WHO BOARD Stattox.....REBORN!