Oh boy this is a rough one.

10. Fallout 3
9. Flappy Bird
8. Rome: Total War
7. Crusader Kings 2
6. Dragon Age: Origins
5. Total War: Shogun 2
4. Mass Effect 2
3. The original Super Smash Brothers
2. EVE Online
1. World of Warcraft: Burning Crusade Era - what a time to be alive.

[b]Honorable Mentions[/b]
Super Smash Brothers Melee, Kim Kardashian: Hollywood, Battle for Middle Earth 2.

Distant Worlds: Universe, if I wind up getting it, just might make the list.

[b]Dishonorable Mentions[/b]
Mass Effect 3, the entire Elder Scrolls franchise.