Ruttigers Almanac is an OSR-compatible tabletop roleplaying game system that combines frenetic, fun mechanics with a clutch of mini-games to bring chaos to your table, alongside an expansive setting to explore and plunder.

The oldest and most influential sci-fi TTRPG of all time meets the world’s most popular roleplaying game, with a complete 5e conversion by World’s Largest RPGs.

Ready to level up your strategy game play? From Axis & Allies, to Diplomacy, to Ikusa, there's something for every era.