nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq7w9q3zt3tqqa6cy5jwcs0z4ht93m5gw2mlq9pnpvmme72en64vkqsw784u (nprofile…784u) there was a book that expanded on the topic and "allowed" mutant campaigns but they were also incredibly punishing in terms of mutations. Half of the things you did, met or used had a random chance of mutation, plus the moon thing. And one character could take finite amount of mutations before becoming uplayable chaos spawn.
It was all one note horse, same as 40k.