Games like YASG
Games like YASG include Totally Accurate Battle Simulator, People Playground, Game Dev Tycoon, WorldBox - God Simulator, and Slime Rancher. We matched them by the tags players give YASG on Steam (Indie, Simulation, Early Access, Sandbox, and 2D): closest matches first, and among equally close ones the better-known games.

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Indie

People Playground
Shared: Sandbox · 2D · Simulation

Game Dev Tycoon
Shared: Simulation · Indie · 2D

WorldBox - God Simulator
Shared: Simulation · Sandbox · Indie

Slime Rancher
Shared: Cute · Simulation · Sandbox

Paralives
Shared: Simulation · Indie · Sandbox

Spaceflight Simulator
Shared: Sandbox · Simulation · 2D

Feed and Grow: Fish
Shared: Simulation · Early Access · Indie

Graveyard Keeper
Shared: Simulation · Indie · Sandbox

Stardew Valley
Shared: Simulation · Sandbox · Indie

Reus
Shared: Indie · Simulation · Sandbox

鬼谷八荒 Tale of Immortal
Shared: Simulation · Sandbox · Indie

Ultimate Epic Battle Simulator
Shared: Simulation · Sandbox · Indie

Potion Craft: Alchemist Simulator
Shared: Simulation · Indie · 2D

Kerbal Space Program
Shared: Simulation · Sandbox · Indie

Terraria
Shared: Sandbox · 2D · Indie

Goat Simulator
Shared: Simulation · Sandbox · Indie

Automation - The Car Company Tycoon Game
Shared: Simulation · Sandbox · Early Access

MyVoiceZoo
Shared: Simulation · Sandbox · Cute

Papers, Please
Shared: Indie · Simulation · 2D

Noita
Shared: Indie · Sandbox · 2D

Prison Architect
Shared: Simulation · Sandbox · 2D

Wobbly Life
Shared: Simulation · Sandbox · Indie

The Scroll of Taiwu : Beyond The Dome
Shared: Sandbox · Indie · Simulation