Games like Dungeon Rats
Games like Dungeon Rats include Darkest Dungeon® II, Darkest Dungeon®, TROUBLESHOOTER: Abandoned Children, Jagged Alliance 3, and The Last Spell. We matched them by the tags players give Dungeon Rats on Steam (Tactical RPG, Turn-Based Tactics, Party-Based RPG, Turn-Based Combat, and CRPG): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon® II
Shared: Turn-Based Tactics · Dungeon Crawler · Dark Fantasy

Darkest Dungeon®
Shared: Turn-Based Combat · Dungeon Crawler · RPG

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

Jagged Alliance 3
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Combat

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

Stolen Realm
Shared: Turn-Based Tactics · Turn-Based Combat · Tactical RPG

Fell Seal: Arbiter's Mark
Shared: Turn-Based Tactics · Tactical RPG · RPG

King Arthur: Knight's Tale
Shared: Tactical RPG · Turn-Based Tactics · Turn-Based Combat

Pathfinder: Kingmaker - Enhanced Plus Edition
Shared: Party-Based RPG · RPG · CRPG

Stellar Tactics
Shared: Tactical RPG · Turn-Based Tactics · CRPG

XCOM 2
Shared: Turn-Based Combat · Turn-Based Tactics · RPG

Baldur's Gate 3
Shared: Turn-Based Combat · RPG · CRPG

Pillars of Eternity
Shared: RPG · CRPG · Party-Based RPG

Warhammer 40,000: Rogue Trader
Shared: CRPG · RPG · Tactical RPG

Wasteland 3
Shared: CRPG · Tactical RPG · RPG

Clair Obscur: Expedition 33
Shared: Turn-Based Combat · RPG · Fantasy

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

Colony Ship: A Post-Earth Role Playing Game
Shared: Tactical RPG · Party-Based RPG · CRPG

Ash of Gods: Redemption
Shared: Turn-Based Combat · RPG · Isometric

Gloomhaven
Shared: Tactical RPG · Turn-Based Combat · Party-Based RPG

Divinity: Original Sin - Enhanced Edition
Shared: RPG · Party-Based RPG · Turn-Based Combat

Expeditions: Rome
Shared: Party-Based RPG · RPG · Turn-Based Tactics

Battle Brothers
Shared: Turn-Based Tactics · RPG · Turn-Based Combat

Pillars of Eternity II: Deadfire
Shared: Party-Based RPG · RPG · CRPG