Medium- Stayin' Alive (if that name was not yet taken,) Complete all 50 levels.
Hard- Particle Frenzy- Complete the game in alloted time (about 3-5 minutes should be enough)
got the badge. not too hard for a medium. they should make a hard badge for beating it without continuing from the menu, because i did that once or twice.
 "Toss the Turtle"){kind=icon}
 "Orbitron"){kind=icon}
 "Luminara"){kind=icon}
 "Civiballs 2"){kind=icon}
 "Hover Bot Arena"){kind=icon}
 "Little Wheel"){kind=icon}
 "The Last Stand"){kind=icon}
 "Red"){kind=icon}
 "Canabalt"){kind=icon}
 "Feudalism II"){kind=icon}
 "Warlords: Heroes"){kind=icon}