Games like Fishing for Idiots: Single player
Games like Fishing for Idiots: Single player include Retrowave, Garry's Mod, Pinball FX, Goat Simulator, and BeamNG.drive. We matched them by the tags players give Fishing for Idiots: Single player on Steam (Casual, Retro, Resource Management, Atmospheric, and Physics): closest matches first, and among equally close ones the better-known games.

Retrowave
Shared: Retro · Casual · 1980s

Garry's Mod
Shared: Casual · Physics · Singleplayer

Pinball FX
Shared: Retro · Casual · 1990's

Goat Simulator
Shared: Casual · Physics · Open World

BeamNG.drive
Shared: Physics · Simulation · Open World

Placid Plastic Duck Simulator
Shared: Casual · Physics · Collectathon

The Coin Game
Shared: Casual · Physics · Open World

Contraband Police
Shared: Open World · Singleplayer · Simulation

X-Plane 11
Shared: Physics · Open World · Simulation

Fernbus Simulator
Shared: Casual · Atmospheric · Open World

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

Superflight
Shared: Casual · Atmospheric · Physics

Microsoft Flight Simulator (2020) 40th Anniversary Edition
Shared: Physics · Open World · Atmospheric

Retro Rewind - Video Store Simulator
Shared: Casual · Resource Management · Simulation

Where Winds Meet
Shared: Open World · Singleplayer · Casual

Gas Station Simulator
Shared: Casual · Singleplayer · Simulation

Cooking Simulator
Shared: Physics · Singleplayer · Simulation

Slime Rancher 2
Shared: Casual · Open World · Singleplayer

The Witcher 3: Wild Hunt — Remastered
Shared: Atmospheric · Open World · Singleplayer

Papers, Please
Shared: Retro · Singleplayer · Simulation

The Long Dark
Shared: Atmospheric · Open World · Singleplayer

DrainSim
Shared: Casual · Physics · Simulation

Streamer Life Simulator 2
Shared: Casual · Open World · Simulation

Razortron 2000
Shared: Casual · Retro · 1980s