1 hour left on the Crysis deal. Buy it if you don't already have it.

Crysis:
An absolute masterpiece up to a certain point. Several open world levels are simply amazing.

Crysis: Warhead:
A rather mediocre stand-alone add-on. You can't go wrong for ca. 1.5€ though.

Crysis 2:
A good rail shooter from start to finish. Entertaining game, finished it two times in a row.