Classic Radiation Poisoning 2
⚪ Last updated 2020⚠️ Install Order · 3 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 0.5% endorsement rate
- 🏆 #139 of 187 Gameplay mods in this game by downloads
📋 About This Mod
Classic Radiation Poisoning 2
An expansion of sorts, of TheIrontoads' Classic Radiation Poisoning. Fully reintroduces the classic radiation system of previous Fallout titles.
Like TheIrontoads' original mod, this mod adds Radiation Poisoning stages with debuffs from either the isometric (Fallout 1/2) or 3D (Fallout 3/NV) games. This mod also removes Fallout 4's mechanic in which accruing Rads reduces Max HP.
This mod replaces your HUDMenu.swf file so that it can display the Rads bar and HP bar correctly. I have created compatibility patches for various custom HUD mods that affect HUDMenu.swf, including DEF_UI, HUDFramework and HUD76, as well as the Vanilla HUD.
A scripted installer has been provided to help you choose the correct version of the mod.
Plugins are .esp marked as ESL, so they will not affect your Plugin limit.
Installation
Just download and install using your preferred manager tool.
Follow the scripted install to ensure you chose the correct swf and Rad system.
Load order is irrelevant; place wherever.
Usage
Effects are automatically applied when you start the game. Reaching the thresholds for each stage applies debuffs to your SPECIAL stats:
Fallout 1/2
150 rads - Minor Radiation Poisoning. -1 STR
300 rads - Advanced Radiation Poisoning. -1 STR, -1 AGI
450 rads - Critical Radiation Poisoning. -2 STR, -2 AGI, -1 END
600 rads - Deadly Radiation Poisoning. -4 STR, -5 AGI, -3 END. -3 PER, -3 CHR, -1 INT
1000+ rads - Lethal Radiation Poisoning. -6 STR, -5 PER, -5 END, -5 CHR, -3 INT, -6 AGL
Fallout 3/NV
200 rads - Minor Radiation Poisoning. -1 END.
400 rads - Advanced Radiation Poisoning. -2 END, -1 AGI
600 rads - Critical Radiation Poisoning. -3 END, -2 AGI, -1 STR
800 rads - Deadly Radiation Poisoning. -3 END, -2 AGI, -2 STR
1000 rads - Lethal Radiation Poisoning (Death).
If using the Fallout 1/2 system, you can accrue over 1000 Rads and still live. Like in those games you will have 3 in-game hours to reduce your radiation level below 1000 Rads before you finally succumb to the illness and die. (for balancing reasons, I reduced it to 3 hours instead of a full day)
The Fallout 3/NV system will instantly kill the player when they reach 1000 Rads.
Requirements
None, though you sho
Classic Radiation Poisoning 2 expands on TheIrontoads' original mod to fully reintroduce the classic radiation system from earlier Fallout titles. It's a niche gameplay overhaul for players who want the punishing, lore-accurate radiation mechanics of the classics. With over 1,000 endorsements and 206k downloads, it's a well-received mod despite being last updated in 2020.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Community-approved with 1,026 endorsements and over 206k downloads.
- Brings back the authentic radiation mechanics that old-school Fallout fans crave.
- Builds on a proven foundation—TheIrontoads' original mod—so you know the concept works.
⚠️ Cons
- Last updated in November 2020—might have compatibility issues with newer game patches.
- Requires the original Classic Radiation Poisoning mod, which isn't linked here—you'll have to hunt it down.
For Fallout veterans who miss the brutal radiation system of Fallout 1 and 2 and want that classic survival challenge. Skip if you prefer the streamlined radiation in modern Fallout or want a mod with clear documentation.
💡 Beginner Tips
- Make sure you have the original Classic Radiation Poisoning mod installed first—this is an expansion, not a standalone.
- Check the mod's posts section for any compatibility notes or patches, since it hasn't been updated since 2020.
- If you're using a mod manager, let it handle the file placement to avoid overwriting conflicts.
📊 Mod Details
- Game
- Fallout 4 Mods
- Author
- falloutkid12 and TheIrontoads
- Version
- 1.1
- Downloads
- 206,553
- Endorsements
- 1,026
- Category
- Gameplay
- Created
- 10/31/2020
- Updated
- 11/1/2020
🔗 Required By 1 Mod
These mods list this mod as a dependency.
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🔧 How to Install Fallout 4 Mods
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