Game budgets back in the day: IIRC SubCulture sold about 80k copies, so maybe £3m revenue. The team was about ten people for two years. I was paid £20k/yr. So dev cost around £400k. Not surprising a sequel was greenlit.
SubCulture (1997) revival current progress: the game and menus are running with d3d11; audio including music works. Some work to do to get the gamepad button mapping correct, get some things working at high frame rates, play back smacker files, and read directly from the ISO.