Whats the best game available on Android so far?

Okay, everyone raves about how awesome iOS is for gaming (admittedly its pretty good and will only improve) - but I don't really get Android recommendations. Lets start off on the right foot here on the Polygon forums and keep the discussion to the awesome standards we had on The Verge.

Therefore, I ask Android users to tell me what the best games are available for Android devices - phones or tablets.

I want to know!!