Games like Alien Apocalypse
Games like Alien Apocalypse include Don't Starve Together, Rust, Valheim, Terraria, and Raft. We matched them by the tags players give Alien Apocalypse on Steam (Survival, Open World, Aliens, Open World Survival Craft, and Simulation): closest matches first, and among equally close ones the better-known games.

Don't Starve Together
Shared: Survival · Open World Survival Craft · Open World

Rust
Shared: Survival · Open World · Open World Survival Craft

Valheim
Shared: Survival · Open World Survival Craft · Open World

Terraria
Shared: Survival · Open World Survival Craft · Multiplayer

Raft
Shared: Survival · Open World Survival Craft · Open World

ARK: Survival Evolved
Shared: Survival · Open World Survival Craft · Open World

Palworld
Shared: Survival · Open World · Open World Survival Craft

7 Days to Die
Shared: Survival · Open World · Open World Survival Craft

Project Zomboid
Shared: Survival · Open World · Open World Survival Craft

Green Hell
Shared: Survival · Open World Survival Craft · Open World

Once Human
Shared: Open World · Survival · Multiplayer

Conan Exiles Enhanced
Shared: Survival · Open World · Open World Survival Craft

No Man's Sky
Shared: Open World · Open World Survival Craft · Survival

The Forest
Shared: Survival · Open World Survival Craft · Open World

Subnautica
Shared: Survival · Open World Survival Craft · Open World

ICARUS
Shared: Survival · Open World Survival Craft · Multiplayer

Don't Starve
Shared: Survival · Open World Survival Craft · Open World

The Long Dark
Shared: Survival · Open World · Open World Survival Craft

Grounded
Shared: Survival · Open World Survival Craft · Multiplayer

ARK: Survival Ascended
Shared: Survival · Open World · Multiplayer

Dune: Awakening
Shared: Survival · Open World Survival Craft · PvE

Starbound
Shared: Survival · Open World Survival Craft · Open World

Subnautica: Below Zero
Shared: Survival · Open World Survival Craft · Open World

Miscreated
Shared: Survival · Open World · Open World Survival Craft