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Sid Meier's Alpha Centauri™ Planetary Pack on Steam
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Sid Meier's Alpha Centauri™ Planetary Pack includes the original Alpha Centauri and the expansion, Alien Crossfire.
Sid Meier's Alpha Centauri™ Planetary Pack is a strategy, 4x and multiplayer game
developed by Firaxis Games
and published by Electronic Arts.
Released on March 07th 2024 is available on Windows, Steam Deck and Steam Machine.
It has received 461 reviews of which 423 were positive and 38 were negative resulting in a rating of 8.5 out of 10. 😎
The game is currently priced at 4.99€ on Steam.
The Steam community has classified Sid Meier's Alpha Centauri™ Planetary Pack into these genres:
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System requirements
These are the minimum specifications needed to play the game. For the best experience, we recommend that you verify them.
Windows
- OS *: Windows XP / Vista / 7 / 8 / 10
- Processor: 1.8 GHz
- Memory: 512 MB RAM
- Graphics: 3D graphics card compatible with DirectX 9.0c
- DirectX: Version 9.0c
- Storage: 600 MB available space
- Additional Notes: Requires a monitor that supports a minimum resolution of 800x600
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User reviews & Ratings
Explore reviews from Steam users sharing their experiences and what they love about the game.
This was my favorite game when it came out. It finally showed up on Steam. I prefer to play the Alien Crossfire version. BUT... on Windows 11, IT WILL CRASH as soon as the first autosave happens! This is a program bug in the game itself, not Steam's fault. There is a patch that fixes it: Adamite.exe is a program written by Nathan Baggs. Find it on www.nexusmods.com. This patch fixes the program error in SMAX that causes it to crash in Windows 11 (not previous windows versions or Linux). Running Adamite.exe will cause Windows to freak out. No worries! Just override Windows refusal to run the program. There will also be something about hash. Ignore this and continue. Adamite will create a small window. On your computer, go to C:\Program Files (x86)\Steam\steamapps\common\Sid Meier's Alpha Centauri Find terranx.exe (NOT terran.exe) Drag terranx.exe into the window the program created and run the program. It should be very fast. Go back to C:\Program Files (x86)\Steam\steamapps\common\Sid Meier's Alpha Centauri and rename terranx.exe (I used terranxBUGGYORIGINAL.exe) Find terranx_nb.exe, and rename it terranx.exe. Done. Game will run without crashing.
This game is the best of the Civilization series. I bought it when first released in 1999. I've played some of the later Civ games, but they just didn't compare. SMAC is the most brilliant 4x game ever made. Back in 1999, players complained about how complicated the Design Workshop was. The Design Workshop allows you to build units by selecting various components that you've already learned. It's optional - the game will automatically design basic units for you. If you want to make those more powerful, learn how to use Design Workshop. With respect to the Steam version, it works fine on Windows 10. The original game works fine on a PC that doesn't even have a dedicated GPU, but I haven't tested the Steam version yet. Edited Note: This game does include the expansion, Alien Crossfire. Previously, apparently it was accessed by launching from the Steam launcher, but that didn't work for me. I had to find Steam's install directory for this game for SMAC/SMAX, locate the terranx.exe file, make a short cut to it and drag it my desktop. It has a lot more content, and although it defaults to an entirely new set of colonists, you can change them back to the original colonists, or a mixture of both, which ever you prefer. Another edit: I have since found that you can choose which version to launch, if you also bought the Alien Crossfire expansion. At the Steam game menu, select the Gear Icon. It will allow to choose which version to play. The Steam version does not remember your previous settings, which the original disk version did and the old GoG version used to, but the version currently on GoG is the same. It's a serious oversight, if you have ever played using the original disks. On the other hand, the original disks are now flawed on Windows 10, too, although they didn't use to be even as recently as a year ago. It's as if Microsoft really wants us to trash our perfectly good Windows 10 PCs and instead wants us to buy a new Win 11 PC with its necessary spyware chip or something. (Yes, that's snark).
(Note: if you're on Windows 11, you can use the Baggs patch to fix the game crashing if EA hasn't fixed it yet. https://github.com/nathan-baggs/Adamite ) I know Steam says I have next to no hours. It's not counting the hundreds of hours I had on the original copy I bought when I was in high school. The hundreds, if not thousands more hours I played in college once I finally got my hands on Alien Crossfire. I have bought this game four times now. I own a DRM free digital copy and I still spent $5 on a Steam copy just to support it. (One of these days I'll do another campaign! But I also have so many other games that need to be played and so much less time than I did back in the day.) Anyway, this is a fantastic game to this day. It does, of course, show its age. That 2024 release date is a lie; this released in 1999. The writing and world building have aged like fine wine; it's not told in a linear fashion, but the game does have a story you can tease out, and the original seven factions have fantastic writing and flavor. (The expansion factions are mechanically strong, but not quite as interesting for the most part.) While the graphics are a bit rough to the modern eye, they're still functional and entirely readable. It does make heavy use of keyboard shortcuts and menus; it's less intuitive than modern games usually are. I honestly don't know how the learning curve is to the modern gamer; when I first played this I came from Civ II, which is this game's direct predecessor, and a lot of the controls and mechanics carried over; I never had to learn it from scratch. If you like 4X games or well-told science fiction stories and can adapt to the somewhat archaic UI, this is well worth your $5.
Alien Crossfire is broken. A Windows update killed it. It'll good to play again when someone gets a fix to Steam for Steam system download. I'm getting mix of either a "virtual memory crash" or when the first base starts (image for the base won't show and clicking on the screen will crash the game). Other people get a variety of issues/crashes after the Windows ?24H2? update Hopefully, an update via Steam will become available to fix the problems everyone is encountering, with Alien Crossfire.
"I sit in my cubicle, here on the mother world. When I die, they will put my body in a box and dispose of it in the cold ground. And in the million ages to come, I will never breathe, or laugh, or twitch again. So won't you run and play with me here among the teeming mass of humanity? The universe has spared us this moment." Sid Meier’s Alpha Centauri is not merely a strategy game about colonizing an alien world, it is a philosophical argument disguised as a 4X game. Where Civilization asks what humanity can build across history, Alpha Centauri asks what humanity becomes when history, Earth, and all familiar moral boundaries are stripped away. Every faction is not just a political choice, but an ideology pushed to its logical extreme: scientific rationalism without humility, faith without compromise, capitalism without restraint, collectivism without individuality, environmentalism without human sentiment. The brilliance of the game is that it rarely tells you who is right. Instead, it lets each worldview sound persuasive, even noble, before showing the cost of believing too completely in any single answer. Zakharov’s quote captures the game’s cold, unsettling heart. Alpha Centauri is obsessed with humanity’s need to justify itself. Its leaders do not simply want survival, they want cosmic permission. They want Planet to confirm that their ideology was the correct one all along. The religious seek divine meaning, the scientists seek objective mastery, the industrialists seek progress, the environmentalists seek harmony, and yet all of them are capable of cruelty when reality refuses to fit their preferred truth. That is what makes the game feel so much more mature than most science fiction. It understands that the future will not be shaped only by technology, but by the stories people tell themselves to make their ambitions feel righteous. Mechanically, the game still has remarkable depth, but its real achievement is atmosphere. The secret project videos, faction quotes, technology blurbs, and haunting soundtrack create a sense that you are not just expanding a civilization, but participating in the birth of a new human myth. Even simple discoveries feel dangerous, as if every step forward carries some hidden spiritual or ethical consequence. Terraforming is not just improving tiles, it is an act of domination or adaptation. Research is not just a tech tree, it is the slow unraveling of what humans are willing to become. War is not just conquest, it is ideology made physical. What makes Alpha Centauri endure is that it does not treat humanity as either heroic or doomed. It sees us as brilliant, frightened, ambitious, self-deceiving, and almost unbearably curious. The game’s greatest horror is not that humans may destroy themselves, but that they may do so while believing they are saving themselves. Decades later, it remains one of the rare games that feels genuinely intelligent, not because it references philosophy, but because it forces the player to inhabit it. Alpha Centauri is a masterpiece because it turns strategy into self examination, and long after the cities, borders, and wars fade from memory, its central question remains: when humanity reaches the stars, will we transcend our old mistakes, or simply bring better tools with which to repeat them? “Man's unfailing capacity to believe what he prefers to be true rather than what the evidence shows to be likely and possible has always astounded me. We long for a caring Universe which will save us from our childish mistakes, and in the face of mountains of evidence to the contrary we will pin all our hopes on the slimmest of doubts: God has not been proven not to exist, therefore he must exist.” Academician Prokhor Zakharov, For I Have Tasted the Fruit.
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Frequently Asked Questions
Sid Meier's Alpha Centauri™ Planetary Pack is currently priced at 4.99€ on Steam.
No, Sid Meier's Alpha Centauri™ Planetary Pack is currently not on sale. You can purchase it for 4.99€ on Steam.
Yes, Sid Meier's Alpha Centauri™ Planetary Pack received 423 positive votes out of a total of 461 achieving a rating of 8.52.
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Sid Meier's Alpha Centauri™ Planetary Pack was developed by Firaxis Games and published by Electronic Arts.
Yes, Sid Meier's Alpha Centauri™ Planetary Pack is playable and fully supported on Windows.
No, Sid Meier's Alpha Centauri™ Planetary Pack is not playable on MacOS.
No, Sid Meier's Alpha Centauri™ Planetary Pack is not playable on Linux.
Yes, Sid Meier's Alpha Centauri™ Planetary Pack is playable on Steam Deck, though it might require a few minor tweaks. Make sure to check the Steam store page and community feedback on ProtonDB for exact compatibility details.
Yes, Sid Meier's Alpha Centauri™ Planetary Pack is playable on Steam Machine, though it might require a few minor tweaks. Make sure to check the Steam store page and community feedback on ProtonDB for exact compatibility details.
No, Sid Meier's Alpha Centauri™ Planetary Pack does not support VR.
Sid Meier's Alpha Centauri™ Planetary Pack offers both single-player and multi-player modes.
Sid Meier's Alpha Centauri™ Planetary Pack offers both Co-op and PvP modes.
No, Sid Meier's Alpha Centauri™ Planetary Pack does not currently offer any DLC.
No, Sid Meier's Alpha Centauri™ Planetary Pack does not support mods via Steam Workshop.
No, Sid Meier's Alpha Centauri™ Planetary Pack does not support Steam Remote Play.
Yes, Sid Meier's Alpha Centauri™ Planetary Pack is enabled for Steam Family Sharing. This means you can share the game with authorized users from your Steam Library, allowing them to play it on their own accounts. For more details on how the feature works, you can read the original Steam Family Sharing announcement or visit the Steam Family Sharing user guide and FAQ page.
You can find solutions or submit a support ticket by visiting the Steam Support page for Sid Meier's Alpha Centauri™ Planetary Pack.
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Last Updates| Steam data | 22 September 2026 13:19 UTC |
|---|---|
| SteamSpy data | 19 October 2026 13:38 UTC |
| Steam price | 26 October 2026 19:49 UTC |
| Steam reviews | 19 October 2026 22:01 UTC |
If you'd like to dive deeper into the details about Sid Meier's Alpha Centauri™ Planetary Pack, we invite you to check out a few dedicated websites that offer extensive information and insights. These platforms provide valuable data, analysis, and user-generated reports to enhance your understanding of the game and its performance.
- SteamDB - A comprehensive database of everything on Steam about Sid Meier's Alpha Centauri™ Planetary Pack
- SteamCharts - Analysis of Sid Meier's Alpha Centauri™ Planetary Pack concurrent players on Steam
- ProtonDB - Crowdsourced reports on Linux and Steam Deck Sid Meier's Alpha Centauri™ Planetary Pack compatibility
Game modes
Multiplayer
Features
Online players
32
Developer
Firaxis Games
Publisher
Electronic Arts
Release
07 Mar 2024
Platforms