but windows binaries will not run directly on Linux hence they’ll need reinstalling in that case.
Create a wine prefix, point it to the binary.
On Lutris this is “add already installed game”
On Steam this is “add non-steam game”
Though if you point your steam library to the location of the games it will detect them as already installed, then you can go to properties and tell it to use proton or set all non-linux games to use proton. (Proton is a wine wrapper with a steam dependency)
The very first game on the list;
Absolver - Boss re-matches are locked behind an online requirement. Boss loot too. As well as some techniques that can be used in offline play but can only be learned online. Absolver also installs the invasive EAC anti-cheat software even for single player and won’t start without it.

Wouldn’t this work?

Look for any that requires Galaxy.
Their thing is old games (hence the name good old games), most don’t have DRM but it’s not a requirement. It’s like how games in Epic don’t have DRM until they do.
https://www.gog.com/forum/general/drm_on_gog_list_of_singleplayer_games_with_drm/page1
Here’s a list

It’s use is basically “by the time you build an engine that can compete you will be dead”
Performance optimizations are easy, movement is easy. (Compared to starting from scratch) but are you going to spend time on that or something else?
Fortnite runs on phones, they have various demos running on consoles.
Every one knows it’s the best but dumb kids blame the engine for some reason and garner the above response because it points out they have no idea what they’re talking about.
As for the other guy’s comment, programmers work in C++. The Unreal way is to take that code into drag/drop blueprints for designers so they aren’t messing with the programmer’s code. An example involving movement is I recently coded a movement system in C++, now in blueprint there’s a settings menu that exposes the variables so the designer can set jump height, speed, falling speed.
You could use a usb sd card reader but it’s more a comment on how this is a nothing burger.