https://www.pcgamer.com/roguelike-fps-polygod-leaves-early-access-tomorrow/

Polygod is a randomly-generated roguelike FPS about a Faceless One, a legendary assassin with one arm who must prove himself to the seven deities by fighting through their arenas and defeating their Holy Champions in order to ascend to godhood. It features a colorful, minimalist visual style and a "brutal difficulty curve," and after nearly two years on Steam Early Access it will go into full release tomorrow. 

The Faceless One also only has one gun, but he can improve it (and himself) in numerous interesting ways with Blessings, more than 100 character and weapon upgrades that can be purchased with the souls stolen from your fallen enemies. Co-op and competitive multiplayer modes are supported, and levels (including the Blessings) are "seeded," so they can be shared with other players for leaderboard competition.