Games like Gimbal
Games like Gimbal include Garry's Mod, Space Engineers, Terraria, Scrap Mechanic, and People Playground. We matched them by the tags players give Gimbal on Steam (Top-Down Shooter, Building, Multiplayer, Vehicular Combat, and Physics): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Multiplayer · Building · Sandbox

Space Engineers
Shared: Building · Sandbox · Physics

Terraria
Shared: Multiplayer · Sandbox · Building

Scrap Mechanic
Shared: Building · Multiplayer · Sandbox

People Playground
Shared: Sandbox · Physics · Building

From the Depths
Shared: Building · Vehicular Combat · Sandbox

Reassembly
Shared: Building · Sandbox · Indie

Rust
Shared: Multiplayer · Building · Sandbox

Besiege
Shared: Physics · Building · Sandbox

STAR WARS™ Battlefront™ II
Shared: Multiplayer · Shooter · Vehicular Combat

Forts
Shared: Multiplayer · Building · Physics

Kerbal Space Program
Shared: Physics · Sandbox · Building

Brick Rigs
Shared: Building · Multiplayer · Sandbox

Teardown
Shared: Physics · Multiplayer · Sandbox

TerraTech
Shared: Building · Multiplayer · Sandbox

Fireworks Mania - An Explosive Simulator
Shared: Multiplayer · Building · Sandbox

Blockstorm
Shared: Multiplayer · Building · Indie

Cosmoteer: Starship Architect & Commander
Shared: Building · Indie · Multiplayer

RUNNING WITH RIFLES
Shared: Top-Down Shooter · Sandbox · Action

Battlefield™ 2042
Shared: Multiplayer · Shooter · Action

Trailmakers
Shared: Action · Building · Space

King Arthur's Gold
Shared: Multiplayer · Building · 2D

Fun with Ragdolls: The Game
Shared: Physics · Sandbox · Building

Stardew Valley
Shared: Multiplayer · Sandbox · Building