What's the best indie game on PSN no one talks about?

I personally love Trine 1 and 2. I know they're more popular within the Steam audience, but I still think they are underrated. I remember when Trine 2: Complete Story was free with PS plus in Summer of 2014. My buddy and I marathoned the shit out of it and had such a fun co op experience. Trine isn't for everybody though-if you don't like 2D platformers/puzzle games, then you won't like them.

Edit: worth noting that I hated Trine 3.