What's the best indie game you have ever played?

[Vini256]

The ones I've played that I really liked are:

Bit.Trip Runner 2
Ittle Dew
Guacamelee
To the Moon
McPixel
The Stanley Parable (Pretty short, but I loved the narrator)
Amnesia: The Dark Descent (Does that even count as indie?)

And of course, the best indie game I have ever played hasn't released yet, so I need to play it first to be able to say that ;)

EDIT: I still need to play Shovel Knight.. also, Disco Dodgeball is pretty good too.