boss monster:

The Dungeon Building Card game

Inspired by classic video games, Boss Monster challenges you to become a villain, build a dungeon, lure in adventurers, and destroy them! The game’s retro pixel art, innovative “dungeon-building” system and fast-paced gameplay have made it one of the best-selling indie tabletop games of all time!

The collection

Brotherwise Games has released three standalone versions: Boss Monster, The Next Level, and Rise of the Minibosses. They’re all compatible with each other, and with mini-expansions like Crash Landing, Tools of Hero-Kind, and Implements of Destruction. Along with premium accessories like sleeves and playmats, there’s truly everything you need to crush puny heroes like a Boss!

From the community

rulebooks

FAQ & expanded rules

Official Advanced Rules Guide
Fan Made (but better!) expanded rules guide