Background: I'm playing on Very Hard (old Survival), and wanted to try a permadeath, no-health run.
I have noticed a non-deterministic health bar regeneration in Fallout 4, but I cannot pinpoint where it comes from. I just eventually notice that health is back when it shouldn't be. Also, any accumulated rads seem to disappear, and HP appears to go to max.
I installed a mod to stop health regen when levelling up (as well as other assorted texture packs and radio stations which shouldn't affect health). But this regen is not tied to level ups it seems to happen whenever I don't closely watch the health bar. Obviously, I didn't add any mods or perks that regen health.
As far as I understand it the game does not have a default regen-over-time mechanic for health.
Where could I be getting this health and RAD regeneration from?
43 Answers
From your clarification above, it sounds like you possibly have either:
Ghoulish perk - Radiation Damage restores lost Hit Points. In level 4, radiation level will reduce slowly.
Solar powered perk - Increased STR and END during daytime: Direct sunlight heals Radiation Damage and regenerates Hit Points.
4There is a bug in Fallout 4 survival mode, where when you go to sleep while affected by an active effect from a consumable (other than satisfying thirst/hunger), that effect stays indefinitely after you wake up. You will be notified that the consumable has worn off and the effect will not be shown as "active effects" in the Pip-boy. However the effect itself can be seen in the Pip-boy.
For example, I once had a permanent 25 radiation resistance after consuming vegetable soup, with no detectable source (perks, gear, active effects). I don't know if this bug still exists (if it was patched or not) or how consistently it works and with which consumable it works. Health regen is for example granted by deathclaw omelettes.
I made a Fallout 4 mod for that very purpose, called "You Only Live Once" mod by Nuigurumi, available the usual way, through the in-game "Mods" menu. It tracks your received damage (including limb damage) and radiation and doesn't let them decrease, thus removing any healing. You can eat/drink/sleep in new Survival, use stimpaks if you want, take Lifegiver, etc. - they may have their appropriate other effects, just won't restore your health or remove radiation. Well, as far as I have tested. As usual, I can't guarantee it won't screw you up at some point in game. Worked for me, though.
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