This brings back fond memories for me. I was only young, but I remember fighting to get some TV time with the Commodore 64 (considering it connected to your TV). The one game I absolutely loved was Ivan 'Ironman' Stewart's Super Off Road. I played this game repeatedly, I still remember the noise of the tape deck playing the game. I wish I kept my C64, I would probably still play it if I did.
I don't think it really matters how many units the C64 sold, it was a great computer and the first computer I can remember using. It was this computer that made me become a developer, I remember thinking as a kid how exciting it was and how I wanted to work in computers when I grew up (most kids my age wanted to be police or firemen).
You can find the games in any number of places that I won't link to from here. I run that emulator on the custom MAME cabinet that I created about 15 years ago and it hooks up well to the keyboard-simulated arcade controls I have.
It's quite interesting to see how perception of game difficulty have changed. I find that most games that rely on precision movement and fixed difficulty levels are now easy to beat, and I guess parts of it is different controls (e.g. keyboard vs. a big joystick; I remember back in the day too how I was tremendously pleased when I got hold of a joystick that was so sensitive that I could hold it and tense up to make it shake to win on games that relied on moving left/right as fast as you could, compared to my otherwise preferred joystick, which was a heavy-duty Wico model because I had a tendency to break the switches on cheaper stuff), and part of it simply a couple of decades extra experience with computers.
Games that rely on speeding up opponents, on the other hand, like International Karate / IK+, still become "impossible" fairly quickly.
I don't think it really matters how many units the C64 sold, it was a great computer and the first computer I can remember using. It was this computer that made me become a developer, I remember thinking as a kid how exciting it was and how I wanted to work in computers when I grew up (most kids my age wanted to be police or firemen).