Games like Boing Odyssey
Games like Boing Odyssey include Poly Bridge, Garry's Mod, Poly Bridge 2, Bridge Constructor Portal, and People Playground. We matched them by the tags players give Boing Odyssey on Steam (Physics, Building, Sandbox, Puzzle, and Cute): closest matches first, and among equally close ones the better-known games.

Poly Bridge
Shared: Physics · Building · Puzzle

Garry's Mod
Shared: Sandbox · Physics · Building

Poly Bridge 2
Shared: Physics · Building · Puzzle

Bridge Constructor Portal
Shared: Physics · Puzzle · Building

People Playground
Shared: Physics · Sandbox · Building

Kerbal Space Program
Shared: Physics · Sandbox · Building

Besiege
Shared: Physics · Sandbox · Building

Zup! S
Shared: Physics · Puzzle · 2D

Hozy
Shared: Sandbox · Physics · Puzzle

Crazy Machines 3
Shared: Physics · Puzzle · Sandbox

Human Fall Flat
Shared: Physics · Puzzle · Sandbox

Totally Accurate Battle Simulator
Shared: Sandbox · Physics · Strategy

Zup! 3
Shared: Puzzle · Physics · 2D

Scrap Mechanic
Shared: Building · Sandbox · Physics

Space Engineers
Shared: Building · Sandbox · Physics

PC Building Simulator
Shared: Building · Sandbox · Education

Zup!
Shared: Puzzle · Physics · 2D

Forts
Shared: Physics · Building · Sandbox

Brick Rigs
Shared: Sandbox · Building · Physics

World of Goo
Shared: Physics · Puzzle · Building

Scribblenauts Unlimited
Shared: Puzzle · Sandbox · Casual

Planet Coaster
Shared: Building · Sandbox · Strategy

Is This Seat Taken?
Shared: Puzzle · Cute · Logic

Contraption Maker
Shared: Puzzle · Level Editor · Sandbox