Heroes of Hammerwatch II is a rogue-lite action RPG built around expeditions into the perilous Dark Citadel. Its floors are randomly generated and populated with distinct enemies, traps, and challenges, so each journey reshapes the route through the fortress. Combat runs sit alongside persistent advancement: equipment and trinkets can carry lasting upgrades, while rewards earned during a run can define that particular attempt.
Between expeditions, players return to town to improve the hub, unlock support from NPCs, stash items, and customize their approach. Weapons and gear can be enchanted, and discoveries such as blueprints and trinkets open further options for shaping a build. Seven classes, each with three specializations, give character choice another layer; some classes are unlocked through gameplay. After conquering the Citadel, New Game+ continues progression with tougher enemies and stronger rewards.
The format supports both solo play and online co-op for up to four players, making the same cycle of dungeon runs and town development available as a shared challenge.