Torchlight II casts players as heroes facing a threatened world, expanding on the original game with a broad overworld and multiple hub towns in Vilderan. Its action-RPG structure is shaped by four character classes, each offering different play styles, while cosmetic customization lets players distinguish their heroes. The setting shifts through rain, snow, day and night, giving the adventure a varied backdrop.
Randomized levels are central to the game’s replayable design: layouts, paths, loot and monsters change between runs. Alongside the campaign, players can explore with a companion pet, which can travel to town to sell loot, and return to the completed story in New Game Plus with the same character, skills, gold and gear for a greater challenge. Steam Workshop support adds access to mods, with the GUTS editor available for creating and sharing them.
The play format supports both solo adventuring and co-op through LAN or the Internet, with matchmaking for connecting to other players.