Games like XenoHaven
Games like XenoHaven include Terraria, Valheim, Rust, The Forest, and ARK: Survival Evolved. We matched them by the tags players give XenoHaven on Steam (Open World, Sandbox, Survival, Base Building, and Adventure): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Sandbox · Survival · Open World Survival Craft

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

Rust
Shared: Survival · Open World · Sandbox

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

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

ASTRONEER
Shared: Open World · Survival · Open World Survival Craft

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

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

Satisfactory
Shared: Open World · Base Building · Sandbox

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

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

Starbound
Shared: Sandbox · Survival · Open World Survival Craft

Dune: Awakening
Shared: Survival · Open World Survival Craft · Base Building

7 Days to Die
Shared: Survival · Open World · Base Building

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

Core Keeper
Shared: Open World · Survival · Sandbox

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

Conan Exiles Enhanced
Shared: Open World · Survival · Sandbox

Enshrouded
Shared: Open World · Survival · Base Building

The Planet Crafter
Shared: Base Building · Survival · Open World Survival Craft

ARK: Survival Ascended
Shared: Open World · Survival · Base Building

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

Project Zomboid
Shared: Open World · Survival · Sandbox

Sons Of The Forest
Shared: Open World · Survival · Base Building