I “beat” isaac on the Switch (one Dead God), then got it all again for the Steam Deck so I could have mods. Unsure if the mods themselves are tanking the performance, but I don’t really care. It’s up there as one of my favorite games. The creativity of the mod creators has kept me coming back to play custom characters and challenges.
The modding community really is insane. There are a couple of fan-made expansions like Fiend Folio that massively overhaul everything. I hope this update tries not to break mod support.
There is script extender as well now. Crazy shit
FF will NOT run on my deck very well. Not even moving in the spawn room lowers me to low 50’s FPS. It’s a real shame, too.
Have you tried running it with Repentogon? It optimized mod performance and has an options menu to adjust performance settings.
