S
- Salamander
- Samurai
- Sandestin
- Sasquatch
- Scorpion
- Scorpius
- Sergeant
- Sewer rat
- Shade
- Shaman Karnov
- Shark
- Shocking sphere
- Shoosuva
- Shopkeeper
- Shrieker
- Silver dragon
- Silver dragon hatchling
- Silver golem
- Skeleton
- Skeleton king
- Skeleton lord
- Skeleton warrior
- Small luggage
- Small mimic
- Smith
- Snake
- Soldier
- Soldier ant
- Spectre
- Spotted jelly
- Stalker
- Steam vortex
- Stone giant
- Stone golem
- Storm giant
- Straw golem
- Student