Games like Guilds of Mountgate
Games like Guilds of Mountgate include Albion Online, BitCraft Online, Pax Dei, Potion Craft: Alchemist Simulator, and Stardew Valley. We matched them by the tags players give Guilds of Mountgate on Steam (RPG, MMORPG, Idler, Sandbox, and Trading): closest matches first, and among equally close ones the better-known games.

Albion Online
Shared: MMORPG · RPG · Sandbox

BitCraft Online
Shared: MMORPG · Idler · Sandbox

Pax Dei
Shared: MMORPG · Sandbox · RPG

Potion Craft: Alchemist Simulator
Shared: Crafting · Relaxing · Sandbox

Stardew Valley
Shared: RPG · Sandbox · Relaxing

Black Desert
Shared: Sandbox · MMORPG · Crafting

Project: Gorgon
Shared: RPG · MMORPG · Sandbox

Trove
Shared: MMORPG · Sandbox · RPG

Mortal Online 2
Shared: MMORPG · Sandbox · RPG

FINAL FANTASY XIV Online
Shared: RPG · MMORPG · Massively Multiplayer

Graveyard Keeper
Shared: RPG · Crafting · Sandbox

The Elder Scrolls Online - Standard Edition
Shared: RPG · MMORPG · Massively Multiplayer

Shop Titans
Shared: Idler · Crafting · RPG

Scapewatch: Idle MMO
Shared: RPG · Idler · MMORPG

SpiritVale
Shared: MMORPG · RPG · Trading

Dark and Light
Shared: RPG · Sandbox · MMORPG

Plantera
Shared: Idler · Sandbox · RPG

Firestone – Idle Clicker Online RPG
Shared: Idler · RPG · MMORPG

Last Oasis
Shared: RPG · Crafting · Massively Multiplayer

Melvor Idle
Shared: RPG · Idler · Crafting

Rust
Shared: Crafting · Sandbox · RPG

Gloria Victis: Medieval MMORPG
Shared: MMORPG · RPG · Massively Multiplayer

Wild Terra 2: New Lands
Shared: RPG · Sandbox · MMORPG

Kenshi
Shared: RPG · Sandbox · Crafting