Games like Proto-GO-a
Games like Proto-GO-a include Disney Dreamlight Valley, Stardew Valley, PowerWash Simulator, The Sims™ 4, and My Dream Setup. We matched them by the tags players give Proto-GO-a on Steam (Casual, Simulation, Exploration, Relaxing, and Life Sim): closest matches first, and among equally close ones the better-known games.

Disney Dreamlight Valley
Shared: Relaxing · Exploration · Life Sim

Stardew Valley
Shared: Life Sim · Simulation · Relaxing

PowerWash Simulator
Shared: Casual · Simulation · Relaxing

The Sims™ 4
Shared: Life Sim · Simulation · Casual

My Dream Setup
Shared: Simulation · Relaxing · Casual

Townscaper
Shared: Relaxing · Casual · Simulation

SPORE™
Shared: Simulation · Exploration · Casual

Universe Sandbox
Shared: Simulation · Sandbox · Relaxing

Starsand Island
Shared: Casual · Life Sim · Simulation

Restore Your Island
Shared: Simulation · Exploration · Casual

Euro Truck Simulator 2
Shared: Simulation · Relaxing · Exploration

Potion Craft: Alchemist Simulator
Shared: Simulation · Relaxing · Casual

ABZU
Shared: Relaxing · Exploration · Casual

Two Point Museum
Shared: Casual · Simulation · Life Sim

PC Building Simulator
Shared: Simulation · Immersive Sim · Sandbox

Hello Kitty Island Adventure
Shared: Simulation · Casual · Exploration

PowerWash Simulator 2
Shared: Casual · Simulation · Relaxing

Ballads of Hongye: REBORN
Shared: Casual · Simulation · Relaxing

Internet Cafe Simulator 2
Shared: Simulation · Exploration · Life Sim

Everything
Shared: Simulation · Casual · Relaxing

Paralives
Shared: Simulation · Life Sim · Casual

House Flipper
Shared: Simulation · Casual · Relaxing

DAVE THE DIVER
Shared: Casual · Relaxing · Exploration

Placid Plastic Duck Simulator
Shared: Relaxing · Casual · Simulation