Games for clearance price I really enjoyed:
Geometry Wars: Galaxies
Battalion Wars ii
Fire Emblem: Radiant Dawn
Okami (although I'm only 3 hours in)
Zack & Wiki (ok, this was a used copy)
Games I didn't even buy for clearance price:
MadWorld (it's €7 now at the Aldi here....; I don't like violent games)
Little King's Story (don't have time for it)
PunchOut! (saw it for €5... I don't think I'll like it enough for the time investment)
Games I regret buying for clearance price:
The Conduit. (

Makes me sick every time I play it, must be a low framerate. Story is slow, action and levels are boring.)
Disaster: Day of Crisis (so broken, it's practically unplayable)