Colony Siege
Released Sep 2020
Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics. Defend Earth's remaining colonies using an arsenal of deadly weapons to torch, slice, throw, and impale swarms of alien invaders.
92% positive · 258 reviews
Done
All announced content has been released
High confidence
Done
All announced content has been released
High confidence
Where to buy
Steam $9.99 $19.99 −50%
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Evaluation
Colony Siege launched out of Early Access on September 7, 2020, with version 1.18, which added the final campaign mission ("Chaos, the Xeno homeworld"). The developer shipped two post-launch updates shortly after: Update #1 on September 22, 2020, and Update #2 on October 7, 2020, both focused on gameplay balancing, bug fixes, and UI improvements. The last developer communication on record is that October 7, 2020 post. No further updates, announcements, DLC, or roadmap have been published since then. There are no unreleased DLC entries on the store, and the store description makes no mention of planned future content or ongoing content cycles. The game's full update history — from Early Access through launch and two post-launch patches — reads as a completed development arc. Finifugal Games has not communicated any plans for additional content beyond what has already shipped.
Evidence
Second post-launch patch released with gameplay balancing and bug fixes. This is the last developer communication on record.
Colony Siege left Early Access and launched at version 1.18, with the final campaign mission added. Developer noted they would monitor feedback but made no promises of future major content.
Media
Details
Developer
Publisher
Finifugal Games
Achievements
24
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player · Multiplayer · Co-op
About this game
Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics. Use shockwaves and spring traps to propel enemies into cliffs, lava, and other hazards. Build mechs, tanks, and other mobile units. Decimate massed enemies with air, missile, and orbital strikes. Expansive, non-linear campaign supports single player and 2 player online co-op.
Whether fighting the Xenos or the Riven, no colony building is safe from attack. While protecting the colony Citadel is your primary objective, the enemy will not discriminate when it comes to attacking your colony.
Defend against the relentless biomechanical xeno swarm as well as the corrupted Riven that were once human. Both enemy factions behave differently and require different tactics.
Defend with powerful towers that automatically form walls when placed near each other. Use unique traps to slow, impale, burn, or bombard the enemy.
Build and command mobile ground units. Strike the enemy with satellite-powered attacks, long-range missiles, commander abilities, and fighter sorties.
Defensive towers and barriers automatically generate a laser fence when constructed close together, allowing your mobile units passage while restricting enemy movement.
Experience dozens of intense missions from a starmap with branching paths. Press your advantage or repeat previous missions for extra cash.
The entire campaign is cooperative from the very first mission to the last. Consolidate forces with a friend or combine different tactics.
Earn money from completing mission primary and bonus objectives, and spend it on persistent upgrades, new weapons, and different towers, traps, units, and strikes. Unlock powerful perks to buffer your weaknesses or bolster your advantages.
Expect a constant change of scenery as you travel to different planets, moons, space stations, and enormous mobile space platforms.
Defend Your Colony
Whether fighting the Xenos or the Riven, no colony building is safe from attack. While protecting the colony Citadel is your primary objective, the enemy will not discriminate when it comes to attacking your colony.
Defend against the relentless biomechanical xeno swarm as well as the corrupted Riven that were once human. Both enemy factions behave differently and require different tactics.
Use Towers, Traps, Strikes, Mobile Units, and Special Abilities
Defend with powerful towers that automatically form walls when placed near each other. Use unique traps to slow, impale, burn, or bombard the enemy.
Build and command mobile ground units. Strike the enemy with satellite-powered attacks, long-range missiles, commander abilities, and fighter sorties.
Design Mazes Before and During Battle
Defensive towers and barriers automatically generate a laser fence when constructed close together, allowing your mobile units passage while restricting enemy movement.
Embark on an Epic Campaign
Experience dozens of intense missions from a starmap with branching paths. Press your advantage or repeat previous missions for extra cash.
Fight Alone or with a Friend
The entire campaign is cooperative from the very first mission to the last. Consolidate forces with a friend or combine different tactics.
Persistant Progression System
Earn money from completing mission primary and bonus objectives, and spend it on persistent upgrades, new weapons, and different towers, traps, units, and strikes. Unlock powerful perks to buffer your weaknesses or bolster your advantages.
Battle in a Wide Variety of Environments
Expect a constant change of scenery as you travel to different planets, moons, space stations, and enormous mobile space platforms.
Are these done yet?
Last evaluated Jun 25, 2026
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