One installation for two operating systems
One installation for two operating systems
It’s possible to run the same program on both Linux and Windows without altering the underlying file system significantly. Wine typically handles compatibility layers rather than changing core structures, so you should be able to play the game in either environment. However, performance or minor bugs might differ slightly between OSes. You usually don’t need separate copies for each OS unless specific settings require it.
You're all set, just reference the same installation directory. The game will update only the save/config files (typically in documents). A few apps may not support this, so reinstalling might be necessary.
Linux employs a distinct file system, and many games aren’t compatible. Simply pointing to directories won’t function. Instead, you can utilize Wine to run Windows game versions.
Reading and writing to NTFS isn’t a big problem. Adding the same Steam library would be fine, and Steam would handle the required Proton updates—though it doesn’t seem to function properly for me. If you moved files to an ext4 partition instead, they’d likely work (provided Proton is installed).