Alien Horizon (Preview Alpha)

Alien Horizon (Preview Alpha)

Purple Nebula · January 30, 2024 · City Builder, Strategy, Colony Sim, Simulation, Building

Alien Horizon (Preview Alpha) is free to play — no purchase needed. We track it so you know if that ever changes.

PC
Very Positive87% · 2063playing now
This game is free to play. Get it on Steam →

Screenshots

Alien Horizon (Preview Alpha) price

Alien Horizon (Preview Alpha) is free to play — there is no purchase price, on Steam or anywhere else we track. We keep watching it, so if it ever stops being free the price history on this page will show when that happened and what it changed to.

About Alien Horizon (Preview Alpha)

Alien Horizon is a sci-fi survival city builder set on an inhospitable alien planet.

Faced with imminent destruction of Earth, humanity pooled together their resources and sent sleeper ships to nearby potentially habitable planets. But this one turned out to be much less habitable than expected. Can you survive anyway?

From one ship to a colony


Build your colony around the sleeper ship, containing 1000 last survivors from Earth. Construct power sources, housing, infrastructure and factories to ensure comfort of your colonists and provide the colony with all the resources it needs. Manage bus lines, set laws and provide services, making sure your colonists are happy, healthy and productive. Each colonist is their own simulated individual.

On your own


Earth is dead, so it can't help you out here. If you didn't bring something with you, tough luck. Explore the landscape around you to find all the other ships from your fleet that carry supplies, and survey resource deposits to eventually produce your own.

Complex resource management


Manage complex production chains to produce 86 different resources, each with a realistic recipe. Build logistics hubs and set up storages to make sure all of them get to where they need.

Preview alpha


Even though this is a free preview, it's a full-fledged game of its own, with no time or content limitations. It is possible to achieve a self-sufficient colony. The proper game is still in development and will be released later. You can support its development by buying the Donation packs.

Alien Horizon (Preview Alpha) — game info

Platforms
Windows
Steam Deck
Unsupported
Player modes
Single-player
PC Game Pass
Not included

DLC & expansions

What Steam players say

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

Recommended Sep 7, 2026
Very complete for an Alpha Version. Lost track of time and welp it's 5am.
Recommended Aug 16, 2026
This game has amazing potential. It's fun so far but it needs more polish and simplification I think. You're given too much at the start and the level of coplexity is overwhelming
Recommended Jul 31, 2026
One of the most complex city builders that provides continual challenges even in an alpha version. Do not over explore or crash is likely to happen (causes high memory use i this version).
Recommended Jun 28, 2026
Great game that I expect to loose many, many more hours to when the rewrite is complete.
Recommended Jun 26, 2026
the best scifi colony builder ive ever played. although calling it "scifi" might do it injustice, as the mechanics and components are so realistic and believable, it might just be "mars colony training simulator". great art style, great pacing, just love it!
Recommended Jun 17, 2026
Alien Horizon Preview Alpha is an ambitious colony-building and survival management game developed and published by Purple Nebula. Set in a future where humanity is forced to abandon a doomed Earth, the game begins with a desperate mission to establish a new home on a distant alien planet. What initially appears to be a promising refuge quickly reveals itself as a harsh and unforgiving environment, forcing players to overcome countless challenges if they hope to secure humanity’s future. The premise creates a strong sense of responsibility from the outset, as every decision directly impacts the survival of thousands of colonists depending on the success of the settlement. The core gameplay revolves around constructing and expanding a functioning colony capable of supporting a growing population. Players start with limited resources and a group of settlers emerging from cryogenic sleep, then gradually build housing, power infrastructure, industrial facilities, transportation systems, and essential public services. Unlike many city builders that focus primarily on expansion, Alien Horizon places considerable emphasis on sustainability. Every building, production chain, and resource …

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