Dragon Age: Origins Ultimate Edition. Already have on Xbox but what the hell, wanna try some of those mod things people keep talkin' about ;)

Recettear: An Item Shop's Tale is pretty good from what I've seen so far in the demo :) I also second the recomendation for Mount & Blade Warband and The Binding of Isaac. Vampire the Masquerade Bloodlines is good aswell with the unoficial patch but no demo for that one.