A List of my known TTRPG systems

AD&D First Edition

AD&D Second Edition

Warhammer Fantasy Roleplay First Edition

Deadlands Classic

Shadowrun

Pathfinder First Edition

Vampire: The Masquerade

World of Darkness

Scion

Dungeons & Dragons 5th Edition

Mutants & Masterminds 3rd Edition

GURPS 4th Edition

Fantasy AGE

FATE Core

Big Eyes, Small Mouth 4th Edition

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...along with most Open d20 and True d20 systems.