This anime spun off a NES game, a side-scrolling platformer (with guns) that had a few FPS-type sequences. Some of these involved scrolling left and right to simulate spinning in a circle while enemies attacked from all sides, while others were mazes tackled from a first-person perspective. A little dialogue with NPCs was sprinkled in to give the game a half-decent plot.
The levels of the game were all named for movies that most NES-playing kids would have probably never heard of (The Third Man, Apocalypse Now, All About Eve, and Spartacus, to name 4 out of 13), and it's the only NES game that sees the hero get laid. Twice.