What are the good "free" games on android?

I've got some already but I'm lookin' for some good friendly games apps that i can load down on my captivate. Anyone care to share? Thanks.

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street fighter ;
Metal Slug ;
Metal Slug II ;
Dino Cent ;
knights of the round;
Final Fight ;
Mega Man ;
Super Mario ;
Super Mario 2 ;
Super Mario 3 ;
chip and dale ;
chip and dale 2 ;
Super Contra ;

street fighter ;
Metal Slug ;
Metal Slug II ;
Dino Cent ;
knights of the round;
Final Fight ;
Mega Man ;
Super Mario ;
Super Mario 2 ;
Super Mario 3 ;
chip and dale ;
chip and dale 2 ;
Super Contra ;