Fight On! is dedicated to the "freewheeling, do-it-yourself approach that birthed this hobby back in the 1970's", including sandbox games and megadungeons. The print-on-demand fanzine is transparently focused on early versions of D&D, though the serial numbers are filed off. Other systems supported are clones of older games, like Swords & Wizardry; retro-inspired RPGs like Spellcraft & Swordplay; and other games from the early days of the hobby, like The Empire of the Petal Throne.