Sid Meier's Alpha Centauri™ Planetary Pack

Sid Meier's Alpha Centauri™ Planetary Pack

Firaxis Games · 2024 · Strategy, 4X, Multiplayer, Singleplayer, Space

PC
Very Positive91% · 584
Best price 35 Fair price
$2.19-56%
lowest tracked $0.89
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Steam
Steam
Standard Edition · Steam
$4.99
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Epic Game Store
Epic Game Store
Standard Edition · Epic Games
$4.99
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EA Store
EA Store
Standard Edition · EA App
$4.99
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GOG
GOG
Standard Edition · DRM-Free
$5.99
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Eneba
Eneba
Standard Edition · Steam
$2.19
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About Sid Meier's Alpha Centauri™ Planetary Pack

✦ AI summary

Lead one of seven ambitious factions in this sci-fi colonization strategy game where you design custom units and outmaneuver rival leaders with distinct personalities and agendas. With deep tactical gameplay rooted in the Civilization legacy, each faction's unique strengths and hidden weaknesses create a dynamic chess match for planetary dominance.

Mankind begins its most monumental task: the colonization of space. A crew of internationally renowned scientists and security strategists, with wide-ranging convictions and diverse ethics, embarks on a mission that will change the world. One Planet. Seven unique factions. Which will you lead? Each faction has its own agenda, each leader a final goal. You must play to each strength and exploit each hidden weakness in your quest to rule the future.

Key features:
  • Great spin-off of the legendary Civilization series, in a refreshing sci-fi setting
  • Design your own units. Balance their speed, power, and toughness to suit your current tactical needs
  • Seven factions to chose from, each with its own artificial intelligence model that creates a very suggestive feeling that you’re up against real people

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jul 6, 2026
Literally the best turn-based strategy game ever made. I can't stand any other compared to this one. Start playing it at 8:30pm and you won't even think to check your watch until it's 5:30am. Trying to improve on SMAC is like trying to improve chess. It can't be done.
1 found this helpful
Recommended Jul 13, 2026
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.
Not recommended Jul 13, 2026
Alien crossfire constantly crashes
Recommended Jul 12, 2026
Game is super. Wish it was more supported. Problems with crashing and incompatibility issues raise a concern. Help with crashing would be much appreciated you can reach me at [email protected] and advise me with what could prevent the game from not launching from steam. Thanks!
Recommended Jul 7, 2026
Always an amazing game. have played it for over twenty years, great stories for all factions and world building lore. nice fast game play make it better in my opinion than the typical Civ games with slower animations.
Recommended Jul 4, 2026
Awesome old-school game.

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