So… this has been a while. I tried (very very briefly) to replicate the stuff that Bottles lists for its “Gaming” prefixes but didn’t have much luck. HOWEVER I then installed Bottles and gave it a go and, as far as I can tell, things are working as intended now. I’m not sure if I’ll go back to try and replicate on Lutris, just to keep everything to the one launcher but, for the moment, I can play.
Could be worth a note somewhere in the description, dammitbird? “Game is not officially supported on Linux but users have reported success using the ‘Gaming’ prefix from ‘Bottles’”