From the introduction: The Micro Chapbook RPG system is an ultra-simple dark fantasy roleplaying game that is designed specifically for solo play. Take on the role of an adventurer, delving into dungeons, killing monsters, gathering gold, and becoming the hero of the town! These basic rules are the definitive rules for the system and are all you need to play any adventure for the system. They are considered the new 1.75 edition rules, but remain completely compatible with all the other game content in the system.