While it has been awhile I have played some more addictiing games.
Assassin's Creed 2 - It is just addicting. I have spent hours trying to find all Feathers, Seals, Glypths, and more and I have still not found them all except for seals. It has more of everything. You can even remeber the first Assassin's Creed game while you are playing #2 due to that Altaire is mention alot, you can play as Altaire in a subsequence, unlock his armor that is cool looking, h**l you can even get Altaire's Outfit from the first game.
Prototype - For some reason almost every single sandbox game is addicting. This one is one of the best. Killing people in gruesom ways, consuming people, destroying buildings, and a whole lot more that made it so addicting. There are 3 problems I have with this game. #1 Bases and Hives spawn way to fast and they don't stop respawing so it makes it difficult for me to kill civilans. #2 Some of the boss battles are way to hard, mostly Elizabeth, the last boss, and the boss that is like the last one except weaker. #3 Every single enemy is annoying as h**l.
Zombie Apocalypse - This is a very fun co-op zombie game. It is hard due to that zombies come from everywhere and you die in 1 hit from everything and plus there is over 50 levels you have to pass.
RE: The Darkside Chroicles - Nothing to explain about this game.
I MAED A GAM3 W1TH ZOMBIES 1N IT !!!1 - This is not a spelling error this is how it is spelled and it is 100% true that I didn't make this. This is like Zombie Apocalypse. I don't have it yet, but I will have it soon since it only cost $1.