Buy One Get One 50% on several titles

Amazon currently has a buy one get one 50% promotion running on various titles for various platforms. Offer states that it is good while supplies last. As of the time of this posting, the list includes:

MLB 11: The Show

Michael Jackson the Experience

Bulletstorm

Assassin's Creed Brotherhood

Dead Space 2

WipeOut

Need For Speed Hot Pursuit

Fighters Uncaged

TRON: Evolution Battle Grids

TRON: Evolution

Pokemon Ranger: Guardian Signs

Club Penguin: Elite Penguin Force: Herbert's Revenge

Zhu Zhu Princess: Carriages and Castles

Rango