Isotope Decay Mod (1.21.1) – Survive Realistic Radiation and Nuclear Decay

Isotope Decay Mod brings realistic nuclear physics and radioactive hazards to your world. It replaces simple danger bars with actual scientific decay, particle types, and measured exposure rates. Dropping radioactive materials creates dangerous hot spots that glow in the dark, while dense blocks like lead and concrete block harmful rays. You can protect yourself with full hazmat suits, monitor your exposure with handheld tools, and cure sickness using real medical treatments.

Features:

• Realistic Radiation Physics: Tracks true radioactive decay and uses scientific units like Becquerels, Grays, and Sieverts to measure exposure.
• Over 40 Real Isotopes: Includes materials like Uranium, Plutonium, and Cesium that break down over time according to their real-world half-lives.
• Material Shielding: Dense blocks such as stone, iron, gold, obsidian, and netherite block incoming rays based on their thickness and density.
• Dropped radioactive items emit dangerous fields and produce a visible glowing aura on the ground.
• Radioactive blocks and fluids can irradiate nearby blocks and slowly transform them over time.
• Chests and barrels holding radioactive loot leak radiation into the surrounding area unless sealed.
• Carrying dangerous items in your inventory or hotbar gives your character direct radiation exposure.
• Prolonged exposure causes screen static overlays and can cause nearby mobs to mutate into strange forms.
• Geiger Counters click faster as radiation grows stronger, while dosimeters track your total body dose.
• Hazmat suits provide full-body protection against hazardous fields and contamination.
• Medical items like Iodine Pills, Prussian Blue, and Radaway help flush dangerous particles from your body.
• Connects radiation mechanics across other popular tech mods into one unified system.

Radiation Types:

• Alpha particles: strong up close but stopped by simple barriers.
• Beta particles: medium range hazards requiring basic shielding.
• Gamma and X-rays: penetrating rays that require thick, dense blocks.
• Neutrons: deep-penetrating radiation that passes through light cover.

Medical Treatments:

• Iodine Pill: prevents the body from taking in radioactive Iodine.
• Prussian Blue: clears out Cesium from your system.
• Anti-Rad Injection: provides an emergency purge against heavy doses.
• Radaway: slowly clears out accumulated radiation over time.
• Rad-Protection Potion: grants temporary resistance against incoming fields.

Screenshots:

Requirements:

NeoForge Required

Isotope Decay Mod Download Links