Games like Mad Zombie
Games like Mad Zombie include 鬼谷八荒 Tale of Immortal, Mount & Blade II: Bannerlord, KovaaK's, We Who Are About To Die, and OMON Simulator. We matched them by the tags players give Mad Zombie on Steam (Action, RPG, Indie, and Simulation): closest matches first, and among equally close ones the better-known games.

鬼谷八荒 Tale of Immortal
Shared: Simulation · RPG · Action

Mount & Blade II: Bannerlord
Shared: RPG · Action · Simulation

KovaaK's
Shared: Action · Simulation · Indie

We Who Are About To Die
Shared: Action · RPG · Simulation

OMON Simulator
Shared: Action · Simulation · Indie

Stardew Valley
Shared: RPG · Simulation · Indie

Drug Dealer Simulator
Shared: Action · Simulation · Indie

Between the Stars
Shared: RPG · Action · Simulation

Bastion
Shared: Action · Indie · RPG

Hades
Shared: Indie · Action · RPG

Kenshi
Shared: RPG · Simulation · Action

Dust: An Elysian Tail
Shared: Action · Indie · RPG

Cyber Manhunt
Shared: RPG · Simulation · Indie

Plebby Quest: The Crusades
Shared: Indie · RPG · Action

Space Pirates And Zombies 2
Shared: Action · Indie · RPG

Gloria Victis: Medieval MMORPG
Shared: Action · RPG · Simulation

Hades II
Shared: Action · RPG · Indie

Hand Simulator: Survival
Shared: Simulation · RPG · Action

Graveyard Keeper
Shared: RPG · Simulation · Indie

DOKA 2 KISHKI EDITION
Shared: Action · Indie · Simulation

The Wind Road
Shared: Action · RPG · Indie

Black Myth: Wukong
Shared: Action · RPG

BEARS, VODKA, BALALAIKA! 🐻
Shared: Action · Indie · RPG

Pixel Privateers
Shared: RPG · Action · Indie