Games like Game Master Engine
Games like Game Master Engine include TaleSpire, Tabletop Simulator, Stardew Valley, Valheim, and Garry's Mod. We matched them by the tags players give Game Master Engine on Steam (Early Access, Tabletop, RPG, Online Co-Op, and Board Game): closest matches first, and among equally close ones the better-known games.

TaleSpire
Shared: Level Editor · Tabletop · RPG

Tabletop Simulator
Shared: Tabletop · Board Game · Simulation

Stardew Valley
Shared: RPG · Multiplayer · Simulation

Valheim
Shared: Online Co-Op · Building · Multiplayer

Garry's Mod
Shared: Building · Sandbox · Multiplayer

Enshrouded
Shared: Online Co-Op · RPG · Multiplayer

Don't Starve Together
Shared: Multiplayer · Online Co-Op · Co-op

Raft
Shared: Multiplayer · Building · Online Co-Op

Terraria
Shared: Sandbox · Multiplayer · Building

For The King
Shared: RPG · Online Co-Op · Tabletop

7 Days to Die
Shared: Multiplayer · Online Co-Op · Building

RuneScape: Dragonwilds
Shared: Early Access · Online Co-Op · Multiplayer

For The King II
Shared: RPG · Board Game · Online Co-Op

ELDEN RING
Shared: RPG · Multiplayer · Online Co-Op

Rust
Shared: Multiplayer · Building · Sandbox

Liars Bar
Shared: Online Co-Op · Multiplayer · Tabletop

Project Zomboid
Shared: Multiplayer · Sandbox · Building

Baldur's Gate 3
Shared: RPG · Online Co-Op · CRPG

Craftopia
Shared: RPG · Multiplayer · Online Co-Op

Once Human
Shared: Multiplayer · Building · Co-op

The Riftbreaker
Shared: Online Co-Op · Multiplayer · Building

Palworld
Shared: Online Co-Op · Multiplayer · Co-op

Conan Exiles Enhanced
Shared: Building · RPG · Multiplayer

Warhammer: Vermintide 2
Shared: Online Co-Op · Multiplayer · Co-op