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

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

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

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

Terraria
Shared: Open World Survival Craft · Survival · Sandbox

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

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

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

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

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

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

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

Satisfactory
Shared: Open World · Base Building · Crafting

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

Enshrouded
Shared: Open World · Survival · Base Building

Core Keeper
Shared: Open World · Survival · Sandbox

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

Kenshi
Shared: Open World · Survival · Sandbox

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

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

ICARUS
Shared: Open World Survival Craft · Survival · Open World

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

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

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

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