A generic game system

Lethal Formula is a generic role-playing game system, available in three variants.

Classic uses the original 3D10 system; Lethal Formula 100 develops the percentile system; and Lethal Formula Sport adapts its principles to the sports role-playing game.

The system provides rules for character creation, quest resolution, and combat. For magic, you can use the spellbook or the complete Rolemaster spellbook rules, which I highly recommend.  

For the background, rely on your imagination.

Access to past campaigns