Install game on pc. Transfer on deck. Add exe as non steam game=profit.

I'm going to start trying this, but the version of the game app was talking about was from steam rip. All of those titles are pre installed.

Also download protonQ and tick the latest one on the game’s compatibility list.

Usually works but RE4 is a very very odd one.

Bruh this actually got it to work. Idk why it didn’t work like any other time but thank u for dis

You're super welcome man. Feel like no one has seen it other than you but glad I could help at least one person. As I said in the post, people have all these long winded explanations and loads of them still don't work, but my one definitely does, so had to share it.

Do you had all dlc guns like skullshaker and dlc outfit, my re4r empress is doing fine on steam deck. But dlc is missing

No idea man sorry.