Pre Time Skip
1. Saying Goodbye to Alabasta
2. Luffy denouncing the World Government
3. Hitting the Bell in Skypeia
4. Luffy Agreeing to Help Nami
5. Hitting the Grand Line
You can buy drm free games / music / ebooks, and if you keep backups of your data (like documents and family photos etc), then you shouldn't lose the game. but with a disk, your toddler could put it in the toaster and there goes your $60