R.I.P.

This game is similar to crimsonland in many aspects. It has the level-up system, wich you can select stuff to improve your gun-turret, and every character you choose has 2 unique upgrades. The gameplay is very similar to crimsonland, except that you don't move, you just shoot all that moves. The game can get a little boring after a while tought. But I recommend anyone trying it, and don't worry about kids, there's a kids mode included.