Games like Brainrot Autobattler
Games like Brainrot Autobattler include 9 Kings, Backpack Battles, Legend Creatures(传奇生物), Balatro, and FTL: Faster Than Light. We matched them by the tags players give Brainrot Autobattler on Steam (Strategy, Auto Battler, Roguelite, 2D, and Comedy): closest matches first, and among equally close ones the better-known games.

9 Kings
Shared: Strategy · Auto Battler · Roguelite

Backpack Battles
Shared: Auto Battler · Strategy · Inventory Management

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

Balatro
Shared: Strategy · Roguelite · Singleplayer

FTL: Faster Than Light
Shared: Strategy · Indie · Singleplayer

Slay the Spire
Shared: Strategy · Roguelite · Singleplayer

Super Fantasy Kingdom
Shared: Strategy · Auto Battler · Roguelite

The Binding of Isaac: Rebirth
Shared: Indie · 2D · Replay Value

Slay the Spire 2
Shared: Strategy · Roguelite · Indie

Game Dev Tycoon
Shared: Strategy · Indie · 2D

Plants vs. Zombies GOTY Edition
Shared: Strategy · 2D · Comedy

We Who Are About To Die
Shared: Strategy · Roguelite · Combat

Plague Inc: Evolved
Shared: Strategy · Indie · Singleplayer

Ratropolis
Shared: 2D · Strategy · Roguelite

Backpack Hero
Shared: Inventory Management · 2D · Strategy

The Escapists
Shared: Strategy · 2D · Singleplayer

Vampire Survivors
Shared: Roguelite · 2D · Indie

Tape to Tape
Shared: Roguelite · 2D · Singleplayer

Down with the Ship
Shared: Auto Battler · Inventory Management · Roguelite

He is Coming
Shared: Strategy · Auto Battler · Roguelite

Skul: The Hero Slayer
Shared: Indie · 2D · Roguelite

Gunpoint
Shared: 2D · Indie · Strategy

Meme Mayhem
Shared: Auto Battler · Strategy · Roguelite

Backpack Dungeon
Shared: Strategy · Roguelite · Auto Battler