I wonder why it doesn't have a Mac and Linux version? I mean, DOSBox has version for these systems too...

As of late I see more and more older game released on GOG, that use DOSBox and only have a Windows version. Hmmm...

CGA has nothing to do with it. Color/Graphics Adapter is only concerned with colouring a character/pixel, not pre-render something graphically.

Well, depends on how one sees it, but to me, M.U.L.E. has always been more like a text-based game with some colours here and there, unlike say, Alley Cat or Space Quest which the main gameplay is to navigate in a graphical environment.

Text-based games also have some simple coloured pixels put together here and there. Just look at this list:
https://en.wikipedia.org/wiki/List_of_text-based_computer_games

I know this game, but I don't know this game.

When I was a kid, some of my school friends often went to play this one one of their's Commodore 64, and they talked a lot about it as school. I never did because I lived so much farther from them, I had to go home after school directly. :(

So what is this version? A remake? Emulated? Emulated from which version?

Oh and can it be played alone? I always got an impression from my friends that it was a multiplayer (hotseat) game, so is it only meaningful against other human players?

Well, to be fair - the IBM machines never were invented to be gaming machines, they were meant to be working machines. But yes, without sound cards and even with those horrible CGA adapters in regards of gaming they were terrible (and I really would like to know who the guy was that is responsible for chosing those 4 CGA colors).

As it has been said, it seems to be an actual PC port. Regarding your question if it can be played alone - judging fby this video (from the C64 version)
https://www.youtube.com/watch?v=TE-hzubUJss
it seems to be possible (1 Planeteer only is an option) though it probably would be more fun with more players.

True, then again, PCjr wasn't even fully IBM compatible since it was made for video games also, and yet had better capabilities to compete with Apple and Commodore on that front.

And since people already had something else for games, or needed something to work on (and the price was horrible from what I hear), it just failed.

Never heard of this game
but still a liittle bit interested because of the strategy tag
but i think il have to dig up a lets play video to see how this plays

Speaking of, I remember reading about an Atari emulator that allowed more players over internet. Can't remember that one now.

Or was it Planet M.U.L.E.?

Even for 1983 these graphics are poor.

This game is a bit obscure for me. I've heard about it a lot but it's very odd to see that Seven Cities of Gold (1993) from the very same developer and publisher is offered for lower price.
If M.U.L.E. (1983) was not too niche for you then
PLEASE consider bringing remaining classics from Apogee, Retroism, Ziggurat and Microids, there are some classics available on ZOOM Platform. I'll give one example of each:

Alien Carnage / Halloween Harry (1993, Interactive Binary Illusions/SubZero Software > Apogee)
https://store.steampowered.com/app/358280/Alien_Carnage__Halloween_Harry/

F-117A Stealth Fighter (NES edition) (1992, Microprose > Retroism)
https://store.steampowered.com/app/1245170/F117A_Stealth_Fighter_NES_edition/?curator_clanid=35581101

Chamber of the Sci-Mutant Priestess aka KULT: The Temple of Flying Saucers (1989, ERE Informatique, the pre-Cryo Interactive studio > Ziggurat)
https://store.steampowered.com/app/768480/Chamber_of_the_SciMutant_Priestess/?curator_clanid=36750418

KGB / Conspiracy (1992, Cryo Interactive > Microids)
https://www.zoom-platform.com/product/conspiracy-kgb

Correction: You have business agreements with Apogee, Retroism (Tommo), Ziggurat and Microids! You have a user base ready to buy all those games, what are you waiting for?

I've played many games from Cryo and a few from ERE/Exxos but KGB always eluded me. It was nowhere to be found, not even on mega shelves of local software pirates. It was almost like that game was banned or something.
Currently more and more old classics pop up here and there but not on GOG, that's preposterous.

Indeed. It has been even referenced in both modern film and computer gaming.

PC port, as in the original 1985 "PC booter" release running in DOSBox or something?

Meh, if I'd want to play this game, I'd probably want to opt for some other version (like Commodore 64, Atari 8-bit, NES, MSX...) that maybe has more colors and some actual audio, if any... Even if great graphics and and audio never were that relevant for this particular game, but still.

But I guess buying the inferior (I presume?) 1985 PC version here would give some kind of piece of mind, even if one ended up playing another version on an emulator. I've done that with some games, bought e.g. the poor CGA PC version here and then played the same game's Amiga or Commodore 64 version on an emulator instead.

Mmm no doubt there

I remember this game... Played on the Atari800. Though it looks like an apple or C64 version with how the lines are set up for colors.

So how to play in a nutshell.

Phase 1: Buy/select land
Phase 2: Buy mule and set up on land (Gamble with remaining time to get money?)
Phase 3/4 (automatic): weather event and/or growing food/collecting electricity, and random event
Phase 5: Auction, buy/sell anything you may have or need.

Food gives you more time to act, electricity is used to grow food or mine, gems/mining is... for money... I don't remember a 4th one.

Anyways, you are there 6-12 rounds and who has the highest score wins. If the pirates come (one of 6 random events?), they will take all your mined resources and/or something else i forget what.

Personally i always played only getting electricity, buy all the electricity til i have a monopoly and then sell at high prices. 9/10 i would usually have the highest score.

Also there's a few races. They don't really do much, but human is hardest so you start with $600 instead of $1000, and there's an easy blob where you start with $1400 instead of $1000.

Shame indeed that the game isn't available here. I honestly think that the game mechanics are still innovative, even by today's standards. Extremely simple, yet highly immersive. Game can be quite ruthless, though (almost Sierra style). But I think that's intentional given the setting. Yet I managed to beat the game and I wasn't experienced on adventure games at the time.
Unfortunately many younger gamers will miss a lot of the subtext, since the game relies very heavily on the days of Perestroika and the "hard line" coup against Gorbachev in 1991.

The game would surely get much more deserved recognition if it was sold here.