[GTW] Aliens Crash Game

Pretty simple, if I try and make an alien sim my game freezes. If my sim gets abducted the game freezes. If I use cas full edit mode and try to turn a sim into an alien the game freezes. When this happens it's like a full screen issue and there's no way to reload, I have to restart. I've had this issue with and without mods.

Edit By Crinrict: Added pack tag to title.