I want to introduce you to a few games of German indie developers. Unfortunately they are internationally unknown so far.

Caravan
Stranded in a mysterious desert you have to find a way out. The dwindling water supply and various traps make it difficult to escape. The game is still beta, the developers are still checking for options to publish.
http://www.youtube.com/watch?v=RB6GZgRLMJg

Splatter
A 2D top-down shooter that tells the story of a man who gets into a zombie apocalypse. Very unique atmosphere that is fueled by realistic real-time lighting. Lighting has real impact on the game, because the zombies avoid the light. Sometimes they even sneak behind you in your very own shadow.
http://www.youtube.com/watch?v=NCMoyV1p76U

Entropy
A first person puzzle game. You control a block that supports a sphere (so much for the crazy story :). You have to solve various physics-based puzzles. Some are related to the weight or even the temperature of the playing objects.
http://www.youtube.com/watch?v=pDDGy4H6Etc