Deuteros: The Next Millennium is a sci-fi strategy/exploration game designed by Ian Bird, the sequel to Millennium: Return to Earth. The game was published by Activision for the Amiga and Atari ST in 1991. The goal is to restart from a devastated Earth and guide human civilization to the exploration of the solar system and beyond.
The game was well-received on the Amiga despite the difficulty being higher compared to the predecessor.
Just a note, but this game also came out on the Atari ST and I believe gameplay is identical, with small graphical differences. If you can't get the Amiga going, get the ST version. There are lots of archives online of cr-cked Atari ST games and Deuteros is one of them. There's lots of mature emulators too. Less fiddling than Amigas. Give those a try. Make a copy of the Deuteros game "disk" files, and format a brand new blank "disk" file to use for saving on. Then in-game I believe Deuteros likes you to "format" the disk in-game with it's own little process, so do that, then save and load as you wish. Great game!
If you want to know a game-spoiling cheat, btw, ask me. It enables you to get your space stations right back, after the Methanoids take over. But once you know it, it will spoil the game for you. However it'll also enable you to actually win the drokkin' thing, which takes DAYS or WEEKS otherwise! Damn it's difficult! Especially the damn Methanoids scuppering your mineral production on every planet they conquer, so you have to set it up again all the damn time! Incidentally you can savescum that, but I can't tell you when their next target is actually chosen.