Here are the games I have tested. I would like people to post more recommendations, especially 3d games.

Gun Brothers - doesn't run
Angry Birds - perfect full speed
Meteor Blitz - multitouch full speed, very slight lag
Reckless Racing - the more cars there are on screen the laggier it gets
Raging thunder 2 - full speed awesome
Doodle Jump - perfect
World Attack 2 - perfect
Airport Mania - Full speed awesome
Fruit Ninja - some lag and screen touch detection issues
Asphalt hd - plays low end version full speed
Mini squadron - runs pretty well but controls not very responsive at times.
Hyper jump - full speed perfect
Skies of glory - hard to control plane for some reason

 

Need For Speed won't even start up. Do not waste your money.
TurboFly 3D works great

 

I have given up on Reckless Racing...it is super smooth until cars appear and then it is too annoying to play. Definitely not recommended until they do a fix on it to make it run better on the Optimus. Get raging thunder 2 if you want a good racing game.

 

The secret to making Mini Squadron work better is to only touch the fire button when you want to shoot. If you hold it down, the plane is very hard to control. Multi-touch seems to degrade the quality and responsiveness of the controls. It will run in reduced graphics mode automatically, but it still looks great.

 

The Asphalt HD game that runs on Optimus is really bad when compared to the original and I don't find it to be fun at all. Again I only recommend Raging Thunder 2. No other game comes close.

 

Toon Wars 3d FPS runs pretty well, a little jittery. This phone definitely could run NOVA if it's fine tuned for the phone. I hope Gameloft releases it soon. Toon Wars is actually a pretty boring low quality FPS.