Games like Crypt Keeper
Games like Crypt Keeper include Thronefall, Kingdom Rush - Tower Defense, Kingdom Two Crowns, The King is Watching, and Kingdom Rush 5: Alliance TD. We matched them by the tags players give Crypt Keeper on Steam (Strategy, Tower Defense, City Builder, Cartoony, and Isometric): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: Strategy · Tower Defense · City Builder

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Fantasy

Kingdom Two Crowns
Shared: Tower Defense · City Builder · Strategy

The King is Watching
Shared: Tower Defense · Strategy · Fantasy

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Cartoony

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Tactical · Isometric

Bloons TD 6
Shared: Strategy · Tower Defense · Cartoony

Orcs Must Die!
Shared: Tower Defense · Strategy · Fantasy

Kingdom Rush 6: Genesis TD
Shared: Strategy · Tower Defense · Fantasy

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · Cartoony

Emberward
Shared: Tower Defense · Strategy · Roguelite

Total War: WARHAMMER III
Shared: Strategy · Fantasy · Real Time Tactics

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Fantasy

Bee Island
Shared: Strategy · Tower Defense · City Builder

Rogue Tower
Shared: Strategy · Tower Defense · Roguelite

Border Pioneer
Shared: Strategy · Tower Defense · City Builder

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

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · Fantasy

They Are Billions
Shared: Strategy · Tower Defense · City Builder

Stronghold Crusader: Definitive Edition
Shared: Strategy · City Builder · Tower Defense

Stronghold: Definitive Edition
Shared: Strategy · City Builder · Real Time Tactics

Desperados III
Shared: Strategy · Isometric · Real Time Tactics

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

Dungeon Defenders
Shared: Tower Defense · Strategy · Tactical