Radioactivity

Some parts are radioactive, such as Uranium and Plutonium. Radiation can do many things, such as

Radiation affects
each of these affects randomly happens while near a radiation source
 * Damage the player
 * Randomly increase/decrease max health
 * Randomly change jump height
 * Randomly change walkspeed

A geiger counter can measure how much radiation is nearby. The more radiation, the faster the clicks. Frequency of mutations from radiation depends on how much radiation is nearby.