Originally Posted by LoathsomePete

Path of Exile

The best free-to-play game after Dota 2. It's an isometric action role playing game with the look and feel of Diablo II. It's technically an MMO, however you can turn off the in-game chat and will only ever see other players in game hub areas. While it's F2P, it's not pay-to-win, and any microtransactions are all cosmetic based and won't affect your stats in any way. Definitely worth a look if you were disappointed with Diablo III and have played your way through Torchlight II.