My game keeps crashing in specific places in almost won missions. Is it memory problems or bugs?
I now have three missions that I can't continue or finish because of crashes. Please help me fix it!

I played this game after I bought it on GoG, and while the first 10 missions or so were fine, at some point it crashed and I couldn't progress further. The crash happens always at the same time, no matter what I change. I uninstalled it and never played it again. You just have to accept this and move on.