Borderlands 2 is the sequel to Borderlands, a popular FPS/RPG. It takes place on a Sci-fi wasteland planet and features various classes and a extremely extensive loot system with "literally millions of weapons."
Torchlight II is an action RPG game that focuses on accumulating loot through quests and defeating enemies.
Diablo III is an action RPG that supports 1-4 players developed and published by Blizzard Entertainment.
Path of Exile is a free to play action-RPG game similar in style to the Diablo franchise. A game focused on deep customization through using unique feeling characters. This is all offered for free, with in-game purchases available for cosmetic items and improved inventory storage.
Borderlands is a 1-4 multiplayer first person shooter where loot is collected in order to progress in the game, much like a dungeon crawler.
Grim Dawn is an old-school themed action RPG hack'n slash game with a dark story and gritty graphics.