All Monsters (12)

• 36 HD Monsters in Basic Fantasy Field Guide Omnibus
  
• 36 HD Monsters in Basic Fantasy Role-Playing Game
  
• 36 HD Monsters in Old-School Essentials Advanced Fantasy Genre Rules
  
• 36 HD Monsters in Old-School Essentials Classic Fantasy
  
• 36 HD Monsters in OSRIC
  
• Brachiosaurus - Jurassic herbivore; long thought to be the largest land dinosaur
  OSRIC
• Dinosaur, Brachiosaurus - Largest members of the sauropod family with heavy bodies, elephantine legs and feet, and long necks and tails
  Field Guide
• Kraken - Possibly the largest known creature, with a body 150 feet long and 10 barbed tentacles that can reach an additional 500 feet
  Field Guide, OSRIC
• Serpent, Giant Devouring - An enormous snake thousands of feet in length with jet-black scales covered in faintly-purple pulsating runes
  Field Guide
• Sperm Whale - Gargantuan whales up to 60' long. Dwell in open oceans and hunt deep sea monsters (e.g. giant squids)
  OSE
• Tarrasque
  OSE-AF
• Whale, Sperm - Enormous predatory whales up to 60 feet long that prey on giant squid
  BFRPG