Games like Ruinlander
Games like Ruinlander include Kenshi, Project Zomboid, Don't Starve Together, Rust, and 7 Days to Die. We matched them by the tags players give Ruinlander on Steam (RPG, Survival, Sandbox, Open World, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

Kenshi
Shared: Survival · Sandbox · RPG

Project Zomboid
Shared: Survival · Open World · Sandbox

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

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

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

Terraria
Shared: Survival · Sandbox · Open World Survival Craft

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

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

Conan Exiles Enhanced
Shared: Survival · Open World · RPG

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

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

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

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

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

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

Stoneshard
Shared: RPG · Survival · Open World Survival Craft

Craftopia
Shared: Survival · Open World · RPG

ATOM RPG: Trudograd
Shared: Survival · RPG · Open World

Once Human
Shared: Open World · Survival · Open World Survival Craft

Necesse
Shared: Open World Survival Craft · Open World · Sandbox

Starbound
Shared: Survival · Sandbox · Open World Survival Craft

Mount & Blade II: Bannerlord
Shared: RPG · Open World · Sandbox

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

Fallout 4
Shared: Open World · RPG · Post-apocalyptic