Doom Delta is a gameplay mod for the GZDoom sourceport that aims to incorporate various elements from the pre-release iterations of Doom. This includes early HUD designs, unused weapon and monster concepts, and four unique playable characters.
- Four unique playable characters from the Doom Bible!
- Three fully functional HUD styles, including the helmet HUD from Doom 0.3!
- Weapons such as the Rifle/Bayonet, the Dark Claw, and the Unmaker!
- New enemies such as the Gargoyle and The Blob!
- Score system with treasure items and kill bonuses!
- Reimagined powerups such as the shields and the Chaos Field!
- Vanilla-style sound design!