Portal series, tell me they aren't the greatest shit valve has ever made.... NO HALF LIFE DOESN'T COUNT!
Any GTA game. Personally san andreas is my favorite, my mini game in the game was to jump from a plane, open parachute and land on a person, young guys / chicks you get 100 points, old people you get 500 points, and cars gets you 50 points. You only get 3 jumps.
Terraria and Minecraft, no matter what anyone says, Terraria is not a rip off of minecraft, first difference is completely cosmetic, Terraria is 2d, minecraft is 3d. Second, Terraria is a fully released game. Third, probably last one, terraria is combat based. And don't tell me Minecraft didn't rip something along the line, so go frada off. Oh, and Notch linked on twitter Terraria's home page, so he isn't bitter towards it, why should you be?