Games like Under the Sea
Games like Under the Sea include Chained Together, Slime Rancher, DAVE THE DIVER, Disney Dreamlight Valley, and Internet Cafe Simulator 2. We matched them by the tags players give Under the Sea on Steam (Simulation, Adventure, Underwater, Casual, and Submarine): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Casual · Simulation

Slime Rancher
Shared: Adventure · Simulation · Exploration

DAVE THE DIVER
Shared: Adventure · Casual · Underwater

Disney Dreamlight Valley
Shared: Adventure · Simulation · Casual

Internet Cafe Simulator 2
Shared: Simulation · Exploration · Sandbox

Goat Simulator 3
Shared: Simulation · Sandbox · Casual

ABZU
Shared: Underwater · Adventure · Casual

Wobbly Life
Shared: Adventure · Simulation · Casual

Hello Kitty Island Adventure
Shared: Adventure · Simulation · Casual

Goat Simulator: Remastered
Shared: Simulation · Adventure · Casual

Squirrel with a Gun
Shared: Simulation · Sandbox · 3D Platformer

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Adventure

House Flipper
Shared: Simulation · Casual · Sandbox

Tree Simulator 2023
Shared: Adventure · Simulation · Casual

SnowRunner
Shared: Simulation · Adventure · Exploration

Placid Plastic Duck Simulator
Shared: Casual · Collectathon · Simulation

Feed and Grow: Fish
Shared: Simulation · Underwater · Adventure

My Time at Portia
Shared: Simulation · Casual · Adventure

SPORE™
Shared: Simulation · Casual · Sandbox

Pumpkin Jack
Shared: Adventure · 3D Platformer · Collectathon

A Hat in Time
Shared: Collectathon · Adventure · 3D Platformer

Starsand Island
Shared: Simulation · Casual · Sandbox

SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated
Shared: Adventure · 3D Platformer · Casual

PowerWash Simulator
Shared: Simulation · Casual · Sandbox