I believe Germany for 1 would ban the game outright if it allowed players to kill kids. Some other countries as well. Larian is NOT going to change that in BG3 or they would be cut off from select markets.
No. Fallout 1/2 have no problems in Germany. That games are flat out banned is an urban myth. But no idea what would happen if a Twitter Wokie or "think of the children trumpist screams about it with all the moral panic going on in the US.
