Fallen Earth uses an engine built in-house by Icarus Studios. It includes:
- World Editor
- Base Editor
- BoneBlender
- CharacterPrep
- EcoSystem Editor
- Head Editor
- LevelPrep
- Object Editor
- Particle Editor
- Sound Prep
- Vehicle Editor
The engine allows for extremely flexible editing of all aspects of a game, from allowing millions of character heads to limitless flora and fauna. Licensing information can be found here.