From the introduction: Flint & Steel brings new rules for classless character building and development without levels, magic and crafting system, combat encounters, a mechanic for both physical damage and mental trauma and rules that can take your character beyond the grave. Flint & Steel uses a d20 principle as a foundation for all rules. User summary: This game is released under the d20 OGL and, though distinct, bears striking similarity to the standard d20 System.