All Monsters (8)

• 13 HD Monsters in Basic Fantasy Role-Playing Game
  
• 13 HD Monsters in Old-School Essentials Classic Fantasy
  
• 13 HD Monsters in OSRIC
  
• Cyclops - 20' tall humanoids with a single, central eye
  OSE, OSRIC
• Dragon Turtle - Massive aquatic creatures up to 200 feet long, occasionally mistaken for rocky outcroppings or small islands
  BFRPG, OSE, OSRIC
• Giant, Cyclops - A one-eyed giant, huge and brutish, resembling hill giants
  BFRPG
• Mammoth - Huge, shaggy prehistoric relatives of the elephant
  BFRPG, OSRIC
• Pit Fiend - Personal servants of Asmodeus, native to the 9th Plane of Hell
  OSRIC