Games like Beneath the Mountain
Games like Beneath the Mountain include Factorio, Medieval Dynasty, Kenshi, Shop Titans, and Mr. Prepper. We matched them by the tags players give Beneath the Mountain on Steam (Fantasy, Management, Crafting, Magic, and Mining): closest matches first, and among equally close ones the better-known games.

Factorio
Shared: Crafting · Management · Survival

Medieval Dynasty
Shared: Crafting · Medieval · Survival

Kenshi
Shared: Survival · Crafting · Management

Shop Titans
Shared: Crafting · Management · Medieval

Mr. Prepper
Shared: Crafting · Management · Survival

Total War: WARHAMMER III
Shared: Fantasy · RTS · Strategy

Potion Craft: Alchemist Simulator
Shared: Crafting · Management · Medieval

Total War: WARHAMMER II
Shared: Fantasy · RTS · Strategy

Travellers Rest
Shared: Management · Crafting · Medieval

Becastled
Shared: Medieval · Base Building · Strategy

Jacksmith: Weapons and Warriors
Shared: Crafting · Medieval · Management

Graveyard Keeper
Shared: Crafting · Management · Medieval

Going Medieval
Shared: Management · Survival · Base Building

The Alters
Shared: Management · Survival · Crafting

Gladiator Guild Manager
Shared: Management · Medieval · Tactical

Blackthorn Arena: Reforged
Shared: Fantasy · Management · Crafting

RimWorld
Shared: Management · Survival · Base Building

Lessaria: Fantasy Kingdom Sim
Shared: Management · Fantasy · RTS

Kingdoms and Castles
Shared: Management · Strategy · Crafting

Infection Free Zone
Shared: Management · Survival · Base Building

This War of Mine
Shared: Survival · Crafting · Management

Mind Over Magic
Shared: Management · Survival · Crafting

Dwarf Fortress
Shared: Management · Base Building · Survival

The King is Watching
Shared: Fantasy · RTS · Base Building