#3 Skyrim
If you thought Oblivion and Morrowind were good looking games, Skyrim reimagines the world of the Elder Scrolls in an entirely new (and entirely better looking) light.
This time around, you must scale the highest peaks and venture into the deepest depths beneath the mountains while fighting hordes of the angry dead, ferocious beasts, and all manner of arcane machinery. Unlike Oblivion, even the dungeons are crafted by hand, so you'll never see the same two dungeons.
You'll even slay dragons in your adventures. It's quite a bit like Dungeons & Dragons in that sense—which begs the question: why hasn't anyone made a D&D game like Skyrim?