Games like Submarine Craft
Games like Submarine Craft include People Playground, Stardew Valley, Terraria, Graveyard Keeper, and Kerbal Space Program. We matched them by the tags players give Submarine Craft on Steam (Simulation, Indie, Sandbox, Building, and Naval): closest matches first, and among equally close ones the better-known games.

People Playground
Shared: Sandbox · Simulation · 2D

Stardew Valley
Shared: Simulation · Pixel Graphics · Sandbox

Terraria
Shared: Sandbox · 2D · Building

Graveyard Keeper
Shared: Simulation · Sandbox · Indie

Kerbal Space Program
Shared: Simulation · Sandbox · Building

Space Engineers
Shared: Sandbox · Building · Simulation

Garry's Mod
Shared: Sandbox · Building · Simulation

Noita
Shared: Sandbox · Indie · Pixel Graphics

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Indie

WorldBox - God Simulator
Shared: Simulation · Sandbox · Building

Papers, Please
Shared: Simulation · Indie · Pixel Graphics

Prison Architect
Shared: Simulation · Sandbox · Building

Besiege
Shared: Simulation · Sandbox · Building

Poly Bridge
Shared: Simulation · Building · Sandbox

TheoTown
Shared: Simulation · Sandbox · Indie

House Flipper
Shared: Simulation · Building · Sandbox

Oxygen Not Included
Shared: Building · Simulation · Sandbox

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

Project Highrise
Shared: Simulation · Building · Sandbox

Two Point Hospital
Shared: Simulation · Building · Sandbox

Gold Mining Simulator
Shared: Simulation · Indie · Sandbox

Sand:box
Shared: Simulation · Sandbox · 2D

Paralives
Shared: Simulation · Indie · Building

Cities: Skylines
Shared: Simulation · Building · Sandbox