With testingcheats on, Cheat code: stats.set_skill_level Major_Anyskills # only works on level up. Reverse or downgrade doesn't work, won't even remove any skills after inserting 0 and reloading game...
Ideas
I have the same issue. The cheat only works for increasing the skill, but not for lowering it.
Months ago this cheat worked. Please fix this, because alien-sims with high mischief-level are a pain...
