Assassins Creed games are always good from single player and the achievements are quite easy to get.7Campaign mostly, I want a lot of achievements. And if I had to count and write all the games I've played it'd take 20 minutes.
I've played all AC, Skyrim, Max Payne 3, and far cry 3. I might try Sleeping dogs though. Thanks.Assassins Creed games are always good from single player and the achievements are quite easy to get.7
Sleeping dogs is quite fun as it focusses on fighting and again the achievements are easy to complete
Bioshocks are pretty fun games, you will fall in love with them.
Max Payne 3
Skyrim is quite long and fantastic game(You would wanna play more then 5 days)
Homefront has a good campaign although its short.
Far Cry 3 is pretty amazing, the weapons are fun to use and you could experiment with your play style