Atomic Science, one of the main mods in the Voltz modpack, had Radiation effects and Hazmat suits. https://www.voltzwiki.com/wiki/Radiation_Poisoning Please can I have some suggestions for other mods with this feature currently? I don't see it in Big Reactors for example, doesn't look like Yellorium damages players (on a quick look). Looks like they do have Hazmat Suits in IC2: http://wiki.industrial-craft.net/index.php?title=Hazmat_Suit Edited: I've found a mod called Magneticraft with radiation, also Nuclearcraft. I've never heard of these mods before, does anyone play them?