Games like Cardboard Leagues
Games like Cardboard Leagues include TCG Card Shop Simulator, Stardew Valley, Supermarket Simulator, BidKing, and Tiny Bookshop. We matched them by the tags players give Cardboard Leagues on Steam (Trading Card Game, Shop Keeper, Simulation, Sports, and Automation): closest matches first, and among equally close ones the better-known games.

TCG Card Shop Simulator
Shared: Simulation · Trading Card Game · Shop Keeper

Stardew Valley
Shared: Life Sim · Simulation · Relaxing

Supermarket Simulator
Shared: Simulation · Trading · Life Sim

BidKing
Shared: Simulation · Shop Keeper · Life Sim

Tiny Bookshop
Shared: Life Sim · Simulation · Shop Keeper

Retro Rewind - Video Store Simulator
Shared: Shop Keeper · Simulation · Relaxing

Potion Craft: Alchemist Simulator
Shared: Simulation · Relaxing · Life Sim

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

Big Ambitions
Shared: Simulation · Life Sim · Capitalism

WorldBox - God Simulator
Shared: Simulation · Life Sim · Sandbox

Recycling Center Simulator
Shared: Simulation · Life Sim · Automation

Another Brick in The Mall
Shared: Simulation · Shop Keeper · Automation

Probably Stolen - Cyberpunk Shopkeeper Sim
Shared: Shop Keeper · Simulation · Trading

Supercar Collection Simulator
Shared: Simulation · Trading Card Game · Trading

Paralives
Shared: Simulation · Life Sim · Relaxing

Mall Simulator
Shared: Simulation · Life Sim · Trading

Roadside Research
Shared: Shop Keeper · Simulation · Relaxing

Tabletop Simulator
Shared: Simulation · Trading Card Game · Card Game

Teddy's Haven
Shared: Shop Keeper · Simulation · Relaxing

Tobacco Shop Simulator
Shared: Shop Keeper · Simulation · Life Sim

Winkeltje: The Little Shop
Shared: Shop Keeper · Trading · Simulation

FeeBay Simulator
Shared: Trading Card Game · Shop Keeper · Automation

Megastore Simulator
Shared: Simulation · Life Sim · Trading

Disney Dreamlight Valley
Shared: Life Sim · Simulation · Relaxing