Games like Settler's Odyssey
Games like Settler's Odyssey include Rust, Terraria, The Forest, PUBG: BATTLEGROUNDS, and Scrap Mechanic. We matched them by the tags players give Settler's Odyssey on Steam (Adventure, Survival, Building, Sandbox, and Simulation): closest matches first, and among equally close ones the better-known games.

Rust
Shared: Survival · Building · Adventure

Terraria
Shared: Survival · Sandbox · Adventure

The Forest
Shared: Survival · Adventure · Building

PUBG: BATTLEGROUNDS
Shared: Survival · FPS · Action

Scrap Mechanic
Shared: Building · Survival · Sandbox

Hurtworld
Shared: Survival · FPS · Building

ARK: Survival Evolved
Shared: Survival · Adventure · Building

Once Human
Shared: Survival · Building · Action

Raft
Shared: Survival · Building · Adventure

Garry's Mod
Shared: Sandbox · Building · FPS

Conan Exiles Enhanced
Shared: Survival · Building · Sandbox

Space Engineers
Shared: Building · Sandbox · Survival

7 Days to Die
Shared: Survival · Building · Adventure

Don't Starve
Shared: Survival · Adventure · Sandbox

Cultivation Tales
Shared: Building · Sandbox · Survival

Far Cry 3
Shared: Adventure · FPS · Action

ARK: Survival Ascended
Shared: Survival · Adventure · Building

Core Keeper
Shared: Survival · Sandbox · Building

TerraTech
Shared: Building · Sandbox · Survival

Portal Knights
Shared: Adventure · Sandbox · Building

Starbound
Shared: Survival · Sandbox · Adventure

Sons Of The Forest
Shared: Survival · Building · Adventure

The Long Dark
Shared: Survival · Adventure · Sandbox

Valheim
Shared: Survival · Building · Adventure