In Overboss Duel, rival Boss Monsters go head-to-head to conquer the Overworld on a shared board. Each turn, players draft and place terrain tiles and monster tokens anywhere, even on their opponent's land! Their goal: to craft the map with the greatest Power and sabotage their rival at every turn to become the ultimate overboss! Designed by Aaron Mesburne and using the same basic system as the hit game Overboss, this fast-paced game combines drafting, set collection, puzzly tile laying, and messing up plans. It's set in the retro-inspired pixel art world of Brotherwise Games' best-selling Boss Monster, with many of the same familiar characters.

Overboss Duel can be played on its own and does not require Overboss to play.