All I could think of is TF2...
Also, I too have a free pass thing to give...I think...
Originally Posted by Ronin
anything that doesnt require lots of time to be good in something that requires skill
You can technically just jump right into the game without much trouble. Only classes I can think of that could be cumbersome is the engineer and the spy.
I mean, if this doesn't convince you:
 Yup...still have the guest pass for TF2