The Monsters Know What They're Doing     Dungeons And Dragons original/official source
Monstrosities     Swords & Wizardry original/official source
Pathfinder 1e Bestiary 1     Pathfinder original/official source
Pathfinder 2e Bestiary 1     Pathfinder original/official source
Pathfinder 2e Bestiary 2     Pathfinder original/official source
Tome Of Horrors Complete     Pathfinder (no source link)
Mythic Adventures     Pathfinder original/official source
Limitless Monsters     D&D 5e original/official source
Dungeons And Dragons Essentials: Monster Vault     D&D 4e (no source link)
Bestiary Of Krynn     D&D 3e (no source link)
Encyclopedia Of Lifeforms Mundane And Magical     D&D 3e (no source link)
D&D 2e Monstrous Manual     D&D 2e (no source link)
Dark Sun: Terrors Of The Desert     D&D 2e original/official source
Scruffy Grognard's Monstrous Manual     D&D 2e (no source link)
Dragonlance Bestiary     SAGA (no source link)
Hacklopedia Of Beasts     Hackmaster original/official source
Monster Guide     World Of Warcraft RPG original/official source
Godforsaken     Cypher System (no source link)
More Meandering Monsters     Tunnels And Trolls (no source link)
Manual Of Monsters     Amazing Adventures (no source link)
Bestiary Of The Beyond     Lone Wolf original/official source
Fantasy Age Bestiary     Fantasy Age original/official source
Monsters And Treasure (2019)     Castles And Crusades original/official source
Harnmaster Gold Bestiary     Harnmaster original/official source
Baby Bestiary 1     Any original/official source