@gamingonlinux Personally I'd globally legalize:
1. Having a copy of a game on your PC regardless of what platform it was meant for (if you have the right to play it ofc)
2. Any attempt and success at making an online game (which includes singleplayer games these days) work after it was shut down
3. Emulating whatever platform a game was made for
4. Distributing abandonware games for free
5. Tempted to also go for allowing further modding

I'd be fine if it was strictly non-commercial