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Sid Meier's Alpha Centauri™ Planetary Pack

Sid Meier's Alpha Centauri™ Planetary Pack

Sid Meier's Alpha Centauri™ Planetary Pack includes the original Alpha Centauri and the expansion, Alien Crossfire.

Released Mar 7, 2024 Developer Firaxis Games Publisher Electronic Arts Platforms Windows Strategy4XMultiplayerSingleplayerSpace
View on Steam ↗ $4.99 (US · as of 2026-07-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.

91.8%positive461 reviews
Recommended · 51 found this helpful

“I’ve been playing this game on and off since 1999, and honestly, nothing else comes close. I still remember the first time I heard Chairman Yang’s voice talking about "Recycling Tanks" as a kid and thinking it was just a cool building, only to realize years later as an adult the…”

— a player, Steam review · 2 hrs played
Recommended · 21 found this helpful

“Firaxis published the best-written strategy game to ever exist and the only Civ game that isn't explicitly and aggressively pro-colonialist and then said "Let's never ever do that again" I am also disappointed but not surprised to see that a third party mod pack makes the…”

— a player, Steam review · 13 hrs played
Recommended · 10 found this helpful

“"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…”

— a player, Steam review · 12 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live count fetched 2026-07-24 01:23 UTC · history via SteamCharts.

45playing at last check
5024-hour peak
276all-time peak
0 50 100 2025 2026 93 avg · Mar 2024

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-25. Steam prices vary by region — always confirm your local price on Steam.

$4.99current · sampled 2026-07-26 08:39 UTC
$4.99lowest since tracking began2026-07-25
US4.99 USD
EU4.99 EUR
UK4.99 GBP
Australia7.95 AUD
Canada6.99 CAD
Japan700 JPY
Brazil29.00 BRL
China28.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

China≈$4.1 Japan Canada US Australia EU Brazil UK≈$6.6

Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-20.

GenresStrategy
Player tagsStrategy · 4X · Multiplayer · Singleplayer · Space · Turn-Based Strategy · Sci-fi (SteamSpy community voting)
FeaturesSingle-player · Multi-player · PvP · LAN PvP · Steam Cloud · Family Sharing
LanguagesEnglish * *
Estimated owners100,000 – 200,000 (SteamSpy)
Minimum system requirements (PC)

Minimum: 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