Thunderforce IV on genesis.
It's hard to tell by screenshot, but the size and number of sprites over a multitude of parallax scrolling, full screen background distortions, background animation, everything displaying at the same time was absolutely gorgeous. And the game achieves a great level of variety of sprites and background with only 8 Mb. The technical level is so high it was doing better not only than most of megadrive games, but I also think better in term of effects and technical level than the equivalent on Neo Geo at this time (ie. games like last ressort, 3~4 years before Metal Slug and oversized cartdridges).
Only a video can show the level of magnificience, I advise to jump from a scene to another : https://www.youtube.com/watch?v=WXbwXJ5qJUs
