Games like Sinking Simulator
Games like Sinking Simulator include People Playground, Garry's Mod, Teardown, Goat Simulator, and BeamNG.drive. We matched them by the tags players give Sinking Simulator on Steam (Simulation, Sandbox, Indie, Casual, and Destruction): closest matches first, and among equally close ones the better-known games.

People Playground
Shared: Sandbox · Physics · Simulation

Garry's Mod
Shared: Sandbox · Physics · Casual

Teardown
Shared: Sandbox · Destruction · Physics

Goat Simulator
Shared: Simulation · Sandbox · Physics

BeamNG.drive
Shared: Simulation · Physics · Sandbox

Besiege
Shared: Simulation · Sandbox · Destruction

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics

Game Dev Tycoon
Shared: Simulation · Indie · Casual

Plague Inc: Evolved
Shared: Simulation · Indie · Casual

Stardew Valley
Shared: Simulation · Sandbox · Indie

Kerbal Space Program
Shared: Simulation · Sandbox · Physics

House Flipper
Shared: Simulation · Sandbox · Casual

Space Engineers
Shared: Sandbox · Simulation · Physics

Turbo Dismount™
Shared: Simulation · Destruction · Physics

Brick Rigs
Shared: Sandbox · Destruction · Simulation

Wreckfest
Shared: Simulation · Destruction · Indie

Universe Sandbox
Shared: Simulation · Sandbox · Physics

Potion Craft: Alchemist Simulator
Shared: Simulation · Indie · Singleplayer

Wobbly Life
Shared: Sandbox · Simulation · Casual

Fun with Ragdolls: The Game
Shared: Sandbox · Simulation · Physics

Demolish & Build 2018
Shared: Simulation · Indie · Destruction

Ship Graveyard Simulator
Shared: Simulation · Indie · Sandbox

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

Sand:box
Shared: Simulation · Sandbox · 2D