Games like Poly Plaza 2
Games like Poly Plaza 2 include Stardew Valley, Black Desert, Mon Bazou, Big Ambitions, and Pax Dei. We matched them by the tags players give Poly Plaza 2 on Steam (RPG, Sandbox, Life Sim, Exploration, and Idler): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: RPG · Life Sim · Sandbox

Black Desert
Shared: Sandbox · Exploration · RPG

Mon Bazou
Shared: Sandbox · Life Sim · Exploration

Big Ambitions
Shared: Life Sim · Sandbox · Capitalism

Pax Dei
Shared: Sandbox · RPG · Exploration

Internet Cafe Simulator 2
Shared: Exploration · Sandbox · 3D

Terraria
Shared: Sandbox · Exploration · Crafting

Kynseed
Shared: Sandbox · Exploration · Life Sim

My Time at Portia
Shared: RPG · Life Sim · Crafting

Euro Truck Simulator 2
Shared: Realistic · Exploration · Driving

Disney Dreamlight Valley
Shared: Life Sim · Exploration · Sandbox

Gothic 1 Remake
Shared: RPG · Exploration · Third Person

My Time at Sandrock
Shared: Life Sim · Sandbox · RPG

Out of Ore
Shared: Sandbox · Exploration · Realistic

Mount & Blade II: Bannerlord
Shared: RPG · Sandbox · Realistic

Starsand Island
Shared: RPG · Life Sim · Sandbox

Crusader Kings III
Shared: RPG · Life Sim · Sandbox

Amber Isle
Shared: Exploration · Life Sim · RPG

Kenshi
Shared: Sandbox · RPG · Crafting

Mortal Online 2
Shared: Sandbox · RPG · Exploration

Rust
Shared: Sandbox · Crafting · RPG

SnowRunner
Shared: Exploration · Sandbox · Realistic

Supermarket Simulator
Shared: Life Sim · Economy · Management

Albion Online
Shared: Sandbox · RPG · Crafting