Cairn is a classless OSR-adjacent adventure game descended from Into the Odd and Knave. Characters are defined by what they carry, combat is fast and dangerous, and you can run almost any adventure you already own with this system.
Under the Floorboards is a cozy dungeon-crawl game about small creatures exploring the spaces humans leave behind. It has a scouting phase where players build a mental map of their target, and then the game tests that memory against what they actually find when they go in.
These two games are both working the same territory: light, fast, dangerous-feeling play, and arriving at completely different feelings at the table.
