The Monsters Know What They're Doing     Dungeons And Dragons original/official source
Monstrosities     Swords & Wizardry original/official source
Angry Golem (web)     D&D 5e 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
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