Games like Plumber 3D
Games like Plumber 3D include Portal, Portal 2, Totally Accurate Battle Simulator, Human Fall Flat, and Poly Bridge. We matched them by the tags players give Plumber 3D on Steam (3D Platformer, Puzzle Platformer, Simulation, Interactive Fiction, and Puzzle): closest matches first, and among equally close ones the better-known games.
Portal
Shared: Puzzle Platformer · 3D Platformer · Puzzle
Portal 2
Shared: Puzzle · Puzzle Platformer · 3D Platformer
Totally Accurate Battle Simulator
Shared: Simulation · Funny · Physics
Human Fall Flat
Shared: Puzzle · Puzzle Platformer · Funny
Poly Bridge
Shared: Simulation · Physics · Puzzle
Biped
Shared: Puzzle · Funny · Puzzle Platformer
Placid Plastic Duck Simulator
Shared: Physics · Relaxing · Simulation
Poly Bridge 3
Shared: Simulation · Puzzle · Physics
Supraland
Shared: Puzzle Platformer · Physics · Puzzle
The Last Campfire
Shared: Puzzle · 3D Platformer · Relaxing
I Am Bread
Shared: Simulation · 3D Platformer · Physics
Viewfinder
Shared: Puzzle Platformer · Puzzle · Physics
PowerWash Simulator
Shared: Simulation · Relaxing · 3D
Hozy
Shared: Puzzle · Relaxing · Simulation
Climber Animals: Together
Shared: Simulation · Puzzle Platformer · Physics
Chained Together
Shared: Puzzle Platformer · 3D Platformer · Simulation
Planet Coaster
Shared: Simulation · Relaxing · Family Friendly
Quantum Conundrum
Shared: Puzzle Platformer · 3D Platformer · Puzzle
Snake Pass
Shared: Puzzle Platformer · Simulation · 3D Platformer
Donut County
Shared: Puzzle · Funny · Physics
Trine 3: The Artifacts of Power
Shared: Puzzle Platformer · 3D Platformer · Puzzle
Refunct
Shared: 3D Platformer · Puzzle Platformer · Relaxing
Wobbledogs
Shared: Simulation · Funny · Physics
Cooking Simulator
Shared: Simulation · Physics · Funny