Games like Avatar Quest Online
Games like Avatar Quest Online include Rust, ARK: Survival Ascended, ARK: Survival Evolved, Garry's Mod, and Scrap Mechanic. We matched them by the tags players give Avatar Quest Online on Steam (FPS, Sandbox, Crafting, Animals, and Building): closest matches first, and among equally close ones the better-known games.

Rust
Shared: Crafting · Sandbox · Building

ARK: Survival Ascended
Shared: Crafting · Dinosaurs · Sandbox

ARK: Survival Evolved
Shared: Crafting · Building · Dinosaurs

Garry's Mod
Shared: Sandbox · Building · FPS

Scrap Mechanic
Shared: Sandbox · Building · Crafting

Hurtworld
Shared: FPS · Crafting · Sandbox

Starbase
Shared: Building · Sandbox · FPS

s&box
Shared: Sandbox · Building · FPS

Medieval Dynasty
Shared: Crafting · Building · Sandbox

Space Engineers
Shared: Sandbox · Building · Simulation

Hydroneer
Shared: Sandbox · Mining · Building

Volcanoids
Shared: Crafting · Sandbox · Building

Kenshi
Shared: Sandbox · Crafting · Simulation

Satisfactory
Shared: Crafting · Sandbox · Building

Raft
Shared: Crafting · Building · Sandbox

Once Human
Shared: Action · Building · Crafting

Terraria
Shared: Sandbox · Crafting · Building

Factorio
Shared: Sandbox · Crafting · Base Building

Subsistence
Shared: Crafting · Sandbox · Building

The Forest
Shared: Crafting · Building · Sandbox

Conan Exiles Enhanced
Shared: Building · Crafting · Sandbox

Last Oasis
Shared: Crafting · Action · Massively Multiplayer

Jurassic World Evolution
Shared: Building · Sandbox · Dinosaurs

GoreBox
Shared: Sandbox · FPS · PvE