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Games like Alien Horizon (Preview Alpha) | IndieDex

Alien Horizon (Preview Alpha)
Games like Alien Horizon (Preview Alpha)

Games like Alien Horizon (Preview Alpha)

A realistic, long-form survival city builder set on an inhospitable alien planet.

Stranded: Alien Dawn
A single-player planet survival sim focused on managing a marooned group through base building and strategic decisions, with a median reviewer playtime of about 34 hours.
2023-04-25
- Science fiction
- Survival

Strategy

Bird view / Isometric

Simulator

Aven Colony cover art

Aven Colony

A single-player sci-fi city builder set on an alien planet, mixing resource management with environmental challenges, offering roughly 24 hours of content—though some players face stability issues.

2017-07-25

Science fiction
Survival
Strategy
Bird view / Isometric
Indie
Simulator
Sandbox

Mercury Fallen cover art

Mercury Fallen

A lengthy single-player sci-fi colony sim about rebuilding an alien underground base, with simple systems and mixed reviews citing rough edges.

2023-08-22

Science fiction
Survival
Strategy
Bird view / Isometric
Indie
Simulator

IXION cover art

IXION

A dark, difficult single-player colony sim set on a space station, mixing base building, resource management, and exploration across a lengthy campaign.

2022-12-07

Survival
Strategy
Bird view / Isometric
Indie
Simulator

Space Haven cover art

Space Haven

A deep single-player spaceship colony sim with tile-by-tile construction, gas and crew management, and space exploration, typically lasting 20–50 hours.

2026-05-13

Science fiction
Strategy
Fantasy
Bird view / Isometric
Indie
Simulator
Role-playing (RPG)

InfraSpace cover art

InfraSpace

A single-player sci-fi city builder centered on supply chains and transport logistics, with an addictive but long endgame.

2023-09-22

Science fiction
Strategy
Indie
Simulator

CryoFall cover art

CryoFall

A sci-fi colony survival sim with base building, crafting, tech research, and both single-player and co-op/PvP multiplayer, described as casual and friendly but with online connectivity requirements.

2021-04-29

Action
Science fiction
Adventure
Survival
Strategy
Bird view / Isometric
Indie
Simulator
Role-playing (RPG)
Open world
Sandbox

Life Below cover art

Life Below

A single-player underwater city-builder about restoring coral reefs through resource management and research, offering a relaxing yet occasionally tricky campaign of around 18 hours.

2026-05-26

Strategy
Fantasy
Simulator

Cliff Empire cover art

Cliff Empire

A post-apocalyptic city builder about managing cliff-side colonies above radioactive fog, with challenging management and a reviewer median playtime of ~79 hours.

2019-08-06

Science fiction
Strategy
Bird view / Isometric
Indie
Simulator

Farthest Frontier cover art

Farthest Frontier

A single-player medieval colony sim focused on building and managing a frontier town through gathering, crafting, and defending against wilderness threats.

2025-10-23

Strategy
Bird view / Isometric
Indie
Simulator
4X (explore, expand, exploit, and exterminate)

ALL WILL FALL cover art

ALL WILL FALL

A post-apocalyptic ocean city-builder with physics-based construction and complex resource management, though mixed reviews cite grindy upkeep and population issues.

2026-04-03

Survival
Strategy
Bird view / Isometric
Indie
Simulator
Sandbox

Surviving the Aftermath cover art

Surviving the Aftermath

A grim, difficult post-apocalyptic colony sim focused on fortified settlement building, resource management, and wasteland expeditions across long single-player sessions.

2021-11-16

Survival
Strategy
Bird view / Isometric
Simulator
Open world