I assume your drive in fstab (or systemd mount, whatever your setup is using) has the ‘defaults’ permission option? If it doesn’t that may be why games aren’t launching. Also exFAT doesn’t have the proper Unix permissions to launch games iirc.
The current stable release is a Gnome fork abomination and the current alpha has a trillion issues. Absolutely terrible for games.
Mech Warrior Online heavily benefits from this, God Eater 1 & 2 require esync and fsync to be disabled to get fast loading screens, wonder if ntsync fixes that.
What? Did you record the rented DVDs on blank tapes or am I misunderstanding?