Games like Doomstacker
Games like Doomstacker include Backpack Battles, Dota Underlords, 9 Kings, Oaken Tower, and The Bazaar. We matched them by the tags players give Doomstacker on Steam (Strategy, Auto Battler, Asynchronous Multiplayer, Multiplayer, and Fantasy): closest matches first, and among equally close ones the better-known games.

Backpack Battles
Shared: Auto Battler · Strategy · PvP

Dota Underlords
Shared: Strategy · Auto Battler · Multiplayer

9 Kings
Shared: Strategy · Auto Battler · Multiplayer

Oaken Tower
Shared: Strategy · Auto Battler · Asynchronous Multiplayer

The Bazaar
Shared: Strategy · Auto Battler · Asynchronous Multiplayer

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

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

The Escapists 2
Shared: Strategy · Multiplayer · Pixel Graphics

Plague Inc: Evolved
Shared: Strategy · Multiplayer · Singleplayer

Balatro
Shared: Strategy · Pixel Graphics · Singleplayer

Legion TD 2 - Multiplayer Tower Defense
Shared: Auto Battler · Strategy · Multiplayer

Sid Meier’s Civilization® VI
Shared: Strategy · Multiplayer · Singleplayer

Despot's Game: Dystopian Battle Simulator
Shared: Auto Battler · Pixel Graphics · Strategy

Mechabellum
Shared: Auto Battler · Strategy · PvP

Legend Creatures(传奇生物)
Shared: Auto Battler · Strategy · Indie

He is Coming
Shared: Strategy · Auto Battler · Fantasy

Blood Bowl 2: Legendary Edition (Classic)
Shared: Strategy · Multiplayer · Fantasy

ENDLESS Legend™
Shared: Strategy · Fantasy · Multiplayer

Blood Bowl 3
Shared: PvP · Strategy · Multiplayer

Dota 2
Shared: Strategy · Multiplayer · PvP

Yu-Gi-Oh! Master Duel
Shared: Strategy · PvP · Multiplayer

Slay the Spire 2
Shared: Strategy · Multiplayer · Roguelike

Terraria
Shared: Multiplayer · Pixel Graphics · 2D

Batomon Showdown
Shared: Auto Battler · Strategy · Asynchronous Multiplayer