This reminds me of all those 80s arcade and Atari/Commodore/Coleco games written almost always by a single person. To think these really iconic experiences were done by someone from start to finish (sounds, graphics, gameplay, idea, execution, debug, etc) as a solo project always seemed a little bizarre to me. Of course those were simpler games but just the creativity plus the know-how is impressive.
I also dont think they had ownership of any of this either. They were paid salary and maybe a small cut of sales. It always seemed like a bad deal considering this was a single creators's project.