Slayer of Beasts is an achievement/trophy in Fallout 3.
Kill 300 creatures. A creature is basically anything living that is not human. Strangely, robots count as creatures.
- You can check how many creatures you have killed by going to the Stats section of the Pip-Boy 3000 and going across to General.
- Throughout the game, you will run into far more than 300 creatures, so this achievement just takes time and patience.
- Killing feral ghouls will result in a creature kill, but non-feral ghouls count as people, toward the Doesn't Play Well with Others achievement/trophy.