Lifthrasil: Apparently no one knows this game, so I'll solve so that the game can continue. The screenshots were from a game called El Dorado 2 (a nice RPG-maker game).
Round is open, whoever wants may post the next game
Leroux: Looks interesting, thanks for the suggestion. But it seems to be available only in German or from German websites? That might explain why noone guessed it. ;)
That's right. That might explain it. I thought it had been translated, but after checking now it seems that I was wrong. Anyway, have fun with it. If you like it you should also try "Die Reise ins All" by the same author (realtroll). Which is a good steampunk RPG.