Games like Shelf Happens
Games like Shelf Happens include PowerWash Simulator, Liars Bar, How to Fish, Supermarket Chaos, and House Flipper. We matched them by the tags players give Shelf Happens on Steam (Simulation, Casual, Online Co-Op, Indie, and Multiplayer): closest matches first, and among equally close ones the better-known games.

PowerWash Simulator
Shared: Casual · Simulation · Multiplayer

Liars Bar
Shared: Casual · Multiplayer · Online Co-Op

How to Fish
Shared: Co-op · Online Co-Op · Multiplayer

Supermarket Chaos
Shared: Casual · Simulation · Collectathon

House Flipper
Shared: Simulation · Multiplayer · Casual

House Flipper 2
Shared: Co-op · Casual · Simulation

PowerWash Simulator 2
Shared: Casual · Simulation · Online Co-Op

Bloons TD 6
Shared: Online Co-Op · Co-op · Multiplayer

Farm Together
Shared: Simulation · Casual · Multiplayer

Fast Food Simulator
Shared: Simulation · Online Co-Op · Co-op

Chained Together
Shared: Co-op · Casual · Online Co-Op

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Simulation · Collectathon

Brick by Brick: Tidy Up the Small Town!
Shared: Simulation · Casual · Online Co-Op

Overcooked! 2
Shared: Co-op · Online Co-Op · Multiplayer

WEBFISHING
Shared: Casual · Multiplayer · Indie

Grocery Store Simulator
Shared: Simulation · Online Co-Op · Co-op

Garry's Mod
Shared: Multiplayer · Casual · Simulation

RV There Yet?
Shared: Co-op · Multiplayer · Online Co-Op

PEAK
Shared: Co-op · Online Co-Op · Multiplayer

Stardew Valley
Shared: Simulation · Multiplayer · Indie

ContractVille
Shared: Simulation · Casual · Online Co-Op

Ranch Simulator: Build, Hunt, Farm
Shared: Simulation · Online Co-Op · Multiplayer

Golf With Your Friends
Shared: Casual · Multiplayer · Indie

Farming Simulator 22
Shared: Simulation · Co-op · Multiplayer