Siege of Centauri

59KS
Released Sep 12, 2019by Stardock EntertainmentMixed(66% of 450 Steam reviews)

Defend against thousands of enemies in this explosive tower defense game. Deploy upgradable towers and unleash powerful orbital abilities as you try to protect Earth's first colony world from destruction.

Offers

What are keyshops?

Official stores

Official stores with direct support.

GamersGate
GamersGateOfficial
updated
Green Man Gaming
Green Man GamingOfficial
updated
Steam
SteamOfficial
updated

Keyshops

Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →

Gamivo
GamivoKeyshop
updated
Lowest price
-78% vs Steam$3.24
Shop now ↗
Eneba
EnebaKeyshop
updated
-78% vs Steam$3.33
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Instant Gaming
Instant GamingKeyshop
updated
$14.99
-77% vs Steam$3.40
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Loaded
LoadedKeyshop
updated
$15.39
-77% vs Steam$3.49
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K4G
K4GKeyshop
updated
-76% vs Steam$3.57
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GameBoost
GameBoostKeyshop
updated
-73% vs Steam$4.03
Shop now ↗

About Siege of Centauri

Communications to Earth's first interstellar colony in Proxima Centauri have gone dark. In response, Earth has dispatched the Carpathia to investigate. Upon arrival, you find a colony under siege. Your mission: save the colony from these brutal alien invaders.

Siege of Centauri puts you in command of the defense of Earth's first interstellar colony. Set in the Ashes of the Singularity universe, thousands of alien machines are attacking and only you, with your arsenal of deployable defense structures and strategic orbital abilities, can stop them.
Customize the Carpathia in order to best handle the challenges of each individual mission, battle across the surface of an alien world through a series of story-driven campaigns or see how long you can survive in a doomed region where the enemy waves are truly endless.

The enemy comes in all shapes and sizes, challenging you to counter them with the right defense in the right place. Siege of Centauri combines the best elements of classic tower defense games with the strategic depth Stardock has delivered in past titles, including Sins of a Solar Empire: Rebellion and Ashes of the Singularity.

Features

  • Defend the colony on Proxima Centauri from hordes of alien invaders in a vast campaign full of challenging missions. Deploy defenses, use powerful orbital abilities, and call units at the right time and place in order to survive the onslaught.
  • Create your own missions using the workshop, then upload and share them with other players. Download new missions created by other users, too.
  • Customize your defenses using dozens of tower upgrades. Determine what you need in order to survive. Upgrade your particle cannon to slow its target, your Artillery Post to leave fire in areas it has attacks, or your Corrosion Mortars so that victims infect the allies around them.
  • Survive against unrelenting enemy waves in Endless Mode and see if you can outlast other players on the leaderboards.
  • Fight against dozens of enemies with unique attacks and defenses. Beware the Falling Star that disables defenses when it explodes, or the Heart of the Phoenix that forms a chrysalis when destroyed that can be reborn as a new Heart.

Game details

Siege of Centauri price history

Lowest tracked price: $3.08 (Jul 13, 2026) · current best: $3.24 across 9 stores.

Siege of Centauri player count & reviews

66% positive reviews all-time · 4 peak players in the last 30 days.

Siege of Centauri — frequently asked questions

Where can I buy Siege of Centauri at the cheapest price?

Right now the cheapest offer for Siege of Centauri is $3.24 at Gamivo. KingsPrice compares 11 offers from 9 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price Siege of Centauri has ever been?

The lowest price KingsPrice has tracked for Siege of Centauri is $3.08 (recorded on Jul 13, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.

How many people play Siege of Centauri?

Siege of Centauri peaked at 4 concurrent players on Steam in the last 30 days (highest on Jul 19, 2026). The player chart on this page updates daily.

Is it safe to buy a Siege of Centauri Steam key from a keyshop?

Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →

How can I get Siege of Centauri at a discount?

Create a free price alert on this page and KingsPrice will email you when Siege of Centauri drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.

System requirements

Minimum

Minimum:
  • Requires a 64-bit processor and operating system
  • OS *: 64-bit Windows 10 / 8.1 / 7
  • Processor: Quad-core Intel / AMD Processor
  • Memory: 6 GB RAM
  • Graphics: 2 GB GDDR5 NVidia GeForce 660 / AMD R7 360 or better
  • DirectX: Version 11
  • Storage: 8 GB available space
  • Sound Card: DirectX Compatible Sound Card
  • Additional Notes: 1920x1080 Display Resolution or Higher; additional disk space will be required during Early Access

Recommended

Recommended:
  • Requires a 64-bit processor and operating system
  • OS *: 64-bit Windows 10 / 8.1 / 7
  • Processor: Intel Core i5 or Equivalent
  • Memory: 8 GB RAM
  • Graphics: 4 GB GDDR5 NVidia GTX 970 / AMD R9 390 or better
  • DirectX: Version 11
  • Storage: 8 GB available space
  • Sound Card: DirectX Compatible Sound Card
  • Additional Notes: 1920x1080 Display Resolution or Higher

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