Games like Castle Stacker
Games like Castle Stacker include Broken Arrow, 9 Kings, Company of Heroes 3, Backpack Battles, and Oaken Tower. We matched them by the tags players give Castle Stacker on Steam (Strategy, Auto Battler, Action RTS, Real Time Tactics, and Roguelike Deckbuilder): closest matches first, and among equally close ones the better-known games.

Broken Arrow
Shared: Strategy · Wargame · Real Time Tactics

9 Kings
Shared: Strategy · Auto Battler · Roguelike Deckbuilder

Company of Heroes 3
Shared: Strategy · Action RTS · Wargame

Backpack Battles
Shared: Auto Battler · Strategy · Roguelike Deckbuilder

Oaken Tower
Shared: Strategy · Auto Battler · 2D

Balatro
Shared: Strategy · Roguelike Deckbuilder · Pixel Graphics

Slay the Spire 2
Shared: Strategy · Roguelike Deckbuilder · Deckbuilding

Luck be a Landlord
Shared: Strategy · Roguelike Deckbuilder · Pixel Graphics

Super Fantasy Kingdom
Shared: Strategy · Auto Battler · Roguelike Deckbuilder

The Bazaar
Shared: Strategy · Auto Battler · Deckbuilding

He is Coming
Shared: Strategy · Auto Battler · Roguelike Deckbuilder

Warhammer Age of Sigmar: Realms of Ruin
Shared: Strategy · Action RTS · Real Time Tactics

Mechabellum
Shared: Auto Battler · Strategy · Wargame

Line War
Shared: Strategy · Action RTS · Auto Battler

Hero's Hour
Shared: Strategy · Auto Battler · Pixel Graphics

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

Thronefall
Shared: Strategy · Action RTS · Medieval

Slay the Spire
Shared: Roguelike Deckbuilder · Strategy · Deckbuilding

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

Kingdom Rush 6: Genesis TD
Shared: Strategy · 2D · Action RTS

Sudden Strike 4
Shared: Strategy · Real Time Tactics · Action RTS

The Escapists 2
Shared: Strategy · Pixel Graphics · 2D

Eslabong
Shared: Strategy · Auto Battler · Fantasy

Ratropolis
Shared: Strategy · 2D · Real Time Tactics