[offtop5]

Cave Story comes to mind.

One dude did all the programming and art.

I wouldn't put too much weight on doing it alone though. I've hired various artists and contractors to assist in my game development. I'm also very liberal with buying Unity assets.

The Last Tree was made by one guy and is full of Unity Asset store art.

The only people who will even notice are other developers.

Honestly using Unity assets as a foundation has made me a much better developer. I'm always finding tricks I didn't know