While playing the game, I noticed that some of the game graphics looked quite familiar.
I did some research on the net to find out where Konami got it's inspiration from. And I must say, In some cases the results are quite shocking.

Some of the graphics used in the intro demo, originate from the 1988 anime "Akira" by Katsuhiro Otomo.
Also, a building from Ridley Scott's movie "Blade Runner" from 1982, a movie that heavilly inspired Konami in SD-Snatcher, can be recognized in the Background as well.

Here's another example of graphics originating from Akira;