UnderMine 2 follows the events of the original action-adventure roguelike, while also being designed as a stand-alone experience. Its story centers on Camilla, demoted to Third Disciplinarian, as she tries to restore the Goldmine and investigate King Faraam’s plans. Along the way, players can rescue helpful characters and unlock new ones, including the Black Rabbit and Inquisitor Danté.
Runs are shaped by a broad mix of returning and new items, character-specific upgrades, abilities, and interactions. Relics called Arcana add abilities and invite unusual builds, from meteor barrages to homing bombs and skeletal totems. The game also encourages improvisation with mechanics such as charming enemies to use their abilities, cycling potions, and turning an oversized bomb into a boss-killing tool. At the bottom, the Well offers a continuing challenge built around planning for its enemies and bosses.
UnderMine 2 supports solo play as well as two-player local co-op across the game, where partners can discover character and item synergies together. Included creation tools and Steam Workshop support also let players make and download items, characters, encounters, quests, and other creations.