Games like Guild of the Tower
Games like Guild of the Tower include Darkest Dungeon® II, Dungeon Settlers, Gladiator Guild Manager, Our Adventurer Guild, and Darkest Dungeon®. We matched them by the tags players give Guild of the Tower on Steam (Party-Based RPG, Dungeon Crawler, Perma Death, Auto Battler, and Management): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon® II
Shared: Dungeon Crawler · Turn-Based Tactics · Perma Death

Dungeon Settlers
Shared: Dungeon Crawler · Management · Base Building

Gladiator Guild Manager
Shared: Auto Battler · Management · Strategy RPG

Our Adventurer Guild
Shared: Party-Based RPG · Management · Dungeon Crawler

Darkest Dungeon®
Shared: Dungeon Crawler · Perma Death · Dark Fantasy

The Last Spell
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

Factorio
Shared: Base Building · Resource Management · Management

鬼谷八荒 Tale of Immortal
Shared: Management · Tactical RPG · Simulation

Dwarves: Glory, Death and Loot
Shared: Auto Battler · Party-Based RPG · Perma Death

Graveyard Keeper
Shared: Management · Crafting · Pixel Graphics

Escape The Mad Empire
Shared: Party-Based RPG · Dungeon Crawler · Tactical RPG

Teamfight Manager
Shared: Management · Auto Battler · Simulation

Oxygen Not Included
Shared: Base Building · Management · Resource Management

Kenshi
Shared: Strategy RPG · Management · RPG

Tactics Ogre: Reborn
Shared: Tactical RPG · Strategy RPG · Turn-Based Tactics

TROUBLESHOOTER: Abandoned Children
Shared: Tactical RPG · Party-Based RPG · Turn-Based Tactics

Those Who Rule
Shared: Party-Based RPG · Tactical RPG · Strategy RPG

Bloodgrounds
Shared: Perma Death · Management · Turn-Based Tactics

Symphony of War: The Nephilim Saga
Shared: Tactical RPG · Strategy RPG · RPG

Sheltered
Shared: Base Building · Management · Resource Management

Dungeon Rats
Shared: Party-Based RPG · Tactical RPG · Dungeon Crawler

Low Magic Age
Shared: Party-Based RPG · Dungeon Crawler · Turn-Based Tactics

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

Punch Club 2: Fast Forward
Shared: Management · Resource Management · Strategy RPG