It's a Vita diablo clone. I'd bought Heroes and Ruin on the 3DS and found it pretty entertaining so plumped for this as it's in the Vita sale.
I've played it in sp for a few hours and I've have to side with Raiziel towards the bottom end of average with regard to a game rating. My old Monster Hunter mate and myself are going to have a crack at the mp tonight.
There's 3 classes to choose from Fighter, Rogue and Mage. I've only played a rogue, but you get a reasonably in depth skill tree to play with. Buffs include sneak, dodge and crit hits. Skills include stuns and dash moves. You can change from melee to ranged weapons with a flick of the D-pad. Combat in sp can get overwhelming with the amount of enemies that can flood onto the screen so I'm hoping that a genuine online co-op mode will make this more bearable ala Monster Hunter. We shall see.