I had 100's of C64 Games - in fact I still have my C64 and most games on 5 1/4. Here's my TOP TEN C64 Games

1. Elite
2. Raid on Bungeling Bay
3. Test Drive
4. Castle Wolfenstein
5. H.E.R.O.
6. Solo Flight
7. Kennedy Approach
8. Test Drive
9. The Boss
10. Dino Eggs

Elite is the best game ever made. I spent HOURS playing that game.
The Boss was a text based Soccer Management Game that was very addictive.