I tried installing this game to my Steam Deck via the Heroic Games Launcher, but the game won't launch. I have tried both Vulkan and DX11, bypassing the launcher, and running/installing the files in the redist folder, and tried Proton experimental and Glorious Eggroll with no luck.

Any advice?

Same thing. If you go to your Data directory and see many .pak.tmp files, i think you hit the same error with "92% download" as everyone else, I've tried cating them together but no luck :/ Hope offline installers works maybe?

Proton GE 8 seems to work fine with DX11. At least that's how I've run it.

Tepiloxtl was on to something with the data folder. Although I never got any errors while installing, it was full of temporary files. So I deleted the data folder on the Steam Deck and copied over the data folder from my pc and put that on the Deck. After that it worked... sort of. Performance was kind of terrible and it did crash, so I'm not sure it's worth the endeavor. Either way, it does run