Assassin's Creed was good, but there's only so many games in one franchise that you can put on a top games list and ACII is the one that deserves to make the cut.

I'm kinda miffed Dota 2 didn't make it, it's very rare that we get games with this extreme depth of game mechanics and skill but I understand why it wouldn't fit into our forum's niche. It also just officially released a few months ago and it's best days are certainly still ahead of it.