All Monsters (9)

• Geminate Serpent, Blue - Deep blue sapphire-scaled serpents that live in colder climates and prey on farmers and livestock
  Field Guide
• Giant, Cyclops - A one-eyed giant, huge and brutish, resembling hill giants
  BFRPG
• Giant, Hill - The smallest of giants, standing ten to twelve feet tall
  BFRPG, OSRIC
• Hill Giant - Hairy, brutish, 12' tall humanoids of low intelligence
  OSE
• Hills Monsters in Basic Fantasy Field Guide Omnibus
  
• Hills Monsters in Basic Fantasy Role-Playing Game
  
• Hills Monsters in Old-School Essentials Classic Fantasy
  
• Hills Monsters in OSRIC
  
• Rock Baboon - Large, particularly intelligent variety of baboon that is omnivorous but prefers meat
  BFRPG, OSE