Games like Caveman Startup
Games like Caveman Startup include Supermarket Simulator, 鬼谷八荒 Tale of Immortal, My Time at Portia, Graveyard Keeper, and Stardew Valley. We matched them by the tags players give Caveman Startup on Steam (Adventure, RPG, Simulation, Management, and Life Sim): closest matches first, and among equally close ones the better-known games.

Supermarket Simulator
Shared: Simulation · Management · Life Sim

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

My Time at Portia
Shared: RPG · Life Sim · Simulation

Graveyard Keeper
Shared: RPG · Simulation · Management

Stardew Valley
Shared: RPG · Life Sim · Simulation

Internet Cafe Simulator 2
Shared: Simulation · Management · Sandbox

The Sims™ 3
Shared: Simulation · Life Sim · Sandbox

PC Building Simulator
Shared: Simulation · Management · Sandbox

Planet Coaster
Shared: Simulation · Management · Sandbox

Disney Dreamlight Valley
Shared: Adventure · Life Sim · Simulation

Slime Rancher
Shared: Adventure · Simulation · Sandbox

TCG Card Shop Simulator
Shared: Simulation · Management · Life Sim

Oxygen Not Included
Shared: Colony Sim · Management · Simulation

Tavern Manager Simulator 🍻
Shared: Simulation · Management · Adventure

WorldBox - God Simulator
Shared: Simulation · Sandbox · Life Sim

Ale & Tale Tavern
Shared: Adventure · Simulation · Management

RimWorld
Shared: Colony Sim · Management · Sandbox

Kenshi
Shared: RPG · Sandbox · Simulation

Shoppe Keep
Shared: RPG · Simulation · Adventure

Youtubers Life
Shared: Management · Life Sim · Adventure

DAVE THE DIVER
Shared: Adventure · Management · RPG

Amazing Cultivation Simulator
Shared: Simulation · RPG · Sandbox

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Sandbox · Adventure

Big Ambitions
Shared: Management · Simulation · Life Sim