Eryi's Action
http://nyu-media.com/eryis-action/
The guys from Nyu Media brought it in the west, and I am absolutely (in a masochistic way) thankful for this.
The game is fun. Pure, evily and sadistically fun. It's balls hard. No, that's an enormous understatement: it's completely and utterly unfair. If you play it as a standard platformer jumpnrun, that is. If you consider the bazillion traps the game offers to kill you as puzzles to be solved, then it truly shines. And the countless deaths become actually very, very funny and make you laugh out loud literally.
So, anybody up for a truly hard challenge should give this game a go.
I won't write more about the gajillion traps in the game because I don't want to spoiler some things. Just a heed of caution: even watch your path on the world map.

Edit: changed thread title a bit.