Grim Dawn is a Hack 'n' Slash Loot'em'Up ARPG developed by Crate Entertainment (developers of Titan Quest). It is published and distributed by Steam Early Access, and has been in development since its first Kickstarter in April 2012. The game surpassed its goal by over $100,000, and the first Alpha version went up in May 2013. The second Chapter in the Third Act released in February 2015, and the recent build has added the Arcanist class in Build 21 (currently B24). The developers licenced the Iron Lore Engine for Titan Quest from Iron Lore, and used the PathEngine for pathfinding, also utilised in Titan Quest.
It is also an exceedingly grim game.