I was just walking down demoscene memory lane yesterday. Some of my favorite demoscene demos were Amiga ones (playlist: https://www.youtube.com/watch?v=RPdB_zdyMbM&list=PLwds84NCmJ...), which lead me to "The Greatest Video Game Tech Demo Ever," Shadow the Beast: https://www.youtube.com/watch?v=ovwFjgAFhOs

That video's great because it breaks down how Psygnosis managed to get 12 layers of parallax scrolling at 50fps and 128 colors on-screen. I never really loved the game as much as (say) Blood Money, but it was an awesome accomplishment in the same way demoscene demos were!