Metal Slug for Megadrive / Sega Genesis / Atari STE

The impossible can be made... A good quality Metal Slug port for Atari STE computer, and Megadrive / Genesis as well. Running at 50 frames per second. Atari STE version makes usage of custom sprite routines, extremely efficient but memory hungry ones. And a 3 voices digital audio mixer. Megadrive/Genesis is a completely different nightmare, while STE computer has 4 MB of RAM, the 16 bits console only has 64 KB of video RAM (around 52 KB available for scenario and sprites), that needs to allocate...