Skyrim, Fallout 4, Sims 4 and Stardew Valley. I have only actually gotten Stardew Valley to work flawlessly... The other 3 I have failed to get working. Just recently this year, I tried manually making my own mod list for Skyrim worth around 400gbs all for it to just crash on start up haha. I spent a week doing that and when I hit that wall, it was such a grueling experience. Personally for me and in my cases, it's never a mod's fault. It's my fault as a modder. One of these days I'll build my perfect Skyrim, one day!