I bought and played a bunch of hours of 20 Minutes Till Dawn this weekend after seeing a single screenshot and knowing it was a bullet heaven game. It's pretty neat but definitely on the lighter end as far as content since I'm already past like Darkness 5 and have almost all the characters and weapons. The Dev posted a blog in March saying a pretty substantial update/overhaul is coming soon though.

The art style is so great and now I have a full set of avatars.