Klei Entertainment

Don't Starve Together

Don't Starve Together made its debut on Steam's Early Access program on December 15, 2014. It supports up to six players at a time, who can be either existing friends or strangers and can play in public or private games. The expansion contains most, if not all, features of the single-player game, but with ongoing balance patches being made for multiplayer. The game was released out of early access on April 21, 2016. If the game is purchased, by itself, two copies are given: one for the purchaser, and one stored as a gift for a friend.

Invisible, Inc.

Turn-based infiltration on procedurally-generated maps arranged into a self-contained story.

Mark of the Ninja

In Mark of the Ninja, you'll know what it is to truly be a ninja. You must be silent, agile and clever to outwit your opponents in a world of gorgeous scenery and flowing animation. Marked with cursed tattoos giving you heightened senses, every situation presents you with options.
(source: steam store page)

Don't Starve

Don’t Starve is an uncompromising wilderness survival game full of science and magic. You play as Wilson, an intrepid Gentleman Scientist who has been trapped by a demon and transported to a mysterious wilderness world. Wilson must learn to exploit his environment and its inhabitants if he ever hopes to escape and find his way back home.

Shank

Shank is a 2D side-scrolling beat 'em up developed by Klei Entertainment. The game features both melee and ranged combat, as well as some acrobatic gameplay. The story was written by God of War co-creator Marianne Krawczyk and tells the tale of Shank's quest for revenge.