Rulebooks
LF100ClassicSport
Lethal Formula 100English · 39 pages · 2026-10-06 PDF ↓Lethal Formula SportSpanish · 35 pages · 2026.07.14 PDF ↓Lethal Formula ClassicSpanish · 39 pages · 2026.10.11 PDF ↓
Supplements
Status and magical professionsEnglish · 4 pages
Expanded magic costEnglish · 2 pages
Virtues (attributes at 10+)English · 16 pages · Playtest version
Magic overloadEnglish · 5 pages
Races of SkyrimSpanish · 1 page
Magic grimoire (beta)Spanish · 6 pages
Each download identifies the PDF language.
One system, three variants
Lethal Formula is a generic role-playing system for creating characters, resolving actions and playing out combat. LF100 uses percentile dice; Classic retains the original 3D10 system; Sport brings its principles to a futuristic sporting setting.