Mark Mandel turned me on to this flash game. I don't usually play games at all, but this one has my interest.
The way it works is you can create a character and pit your character against other characters in fights. The fights are completely automated so there is no skill involved. It is strangely entertaining though.
The character can only fight a few times per day before the character has to rest. That means as far as time wasters go, this one is minimal, only requiring 5 minutes per day or less.
Wanna try it? Jump in the ring! If you don't like it, I'll refund your money. ( LOL just kidding, it doesn't cost anything )