The above screenshot doesn't do Pixel Junk Shooter any justice, but the below video I'd say gives you a better idea of just how beautiful the game is.  The latest in the Pixel Junk series from Q Games, Shooter tasks players with exploring underground caverns filled with lava, water, and dangerous enemies.  

The game is going to support two players in co-op when it ships this fall.  The co-op mode is detailed over at the PlayStation Blog, and it sounds like it's going to be a ton of fun.