Amorphous+ is a small action based game.
You`re controlling this small Dude with his huge sword, bashing over 16 different enemies called gloobes.
(http://img55.imageshack.us/img55/9752/toosharpsk4.png)
The game has different modes (and a bestiary... I love them!).
The nice thing about the game is that you have up to 101 achievements. Every time you get 10 achievements you earn a reward key, which unlocks new features.
The whole thing is getting unbelievable difficult with the time... yay.
(http://www.flashgames.de/images/51797d797c753a71d6a8b2eb9125b24a.jpg)
PLay on Newgrounds (http://www.newgrounds.com/portal/view/450670)
Play on Kongregate (http://www.kongregate.com/games/innocuousGames/amorphous)