Can anybody recommend some Vita Games?

[Ruuku]

I have a question myself, but others can use this thread too.

I have $15.15 left, and I already have 2048 and the HD FURY DLC. There's a piece of DLC I want to get for Armored Core that is $2.95, but I'm going to hold off on it seeing what people suggest.

I'm looking for a game that has a story line at least, Gravity Rush seems good but I haven't been able to find the price of it. I'm not looking for stuff like Super Stardust or Thomas Was Alone.

[Jonny]

I can reommand Ecolibrium.
You have to care for your own ecosystems and there are also some challenges. Winning them gives you Ecopoints (the ingame money) and unlocks new species.
There are also some species that you need to buy.
Anyway, the game is for free.