Ulitsa Dimitrova
Ulitsa Dimitrova is a German game created by Lea Schönfelder and Gerard Delmas. This game actually won big as part of the 2010 IGF Student Winners.
This one is quite unique and interesting. It's not just the graphics but the gameplay and storyline (or lack of it) are one of the major quirks for the game. You'll be playing, Pjotr, a homeless boy that lives in St. Petersburg. Why a seven-year old boy is living on the streets? You'll need to find out for yourself.
And there are disturbing things in this game, but it is nevertheless, an okay game to play. The uniqueness of the graphics alone is interesting enough. Give it a go.