Overview
This guide will show you the path to aquiring radiation incarnate.
Steps
1. Play as whatever character you are most skilled with.
2. Avoid all radiation canisters. Rads dropped by enemies are fine.
3. When you spawn into a level, locate the canister and kill the enemies closes to it first. Enemies may break it while trying to kill you. Also if you kill the enemies near it last the portal is very likely to appear close to it and break it open.
4. You must avoid radiation canisters for 2 levels in a row. On the second the radiation canister should appear bloated
5. On the third level Horror will spawn. He may spawn kill you. You must kill him to be able to play as him. You can also pick up the rads from his laser.
Stuff about Horror
Horror gains a fifth mutation option and the ability to use the rads for the next level to shoot a laser. The rads will be gone forever if you hit something besides an enemy.