Single-player games like Aviassembly
Below are 11 single-player Steam games similar to Aviassembly, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Aviassembly page.
Ranked picks
- 1

Lakehopper
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation and Early Access with Aviassembly.
Take flight in a seaplane flight simulator through a rugged world where you are responsible for the care and maintenance of your plane. Deliver cargo between far-flung communities in a flooded landscape that challenges your piloting skills! Fix your plane and keep flying!
- 2

Flyout
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation and Early Access with Aviassembly.
Build and fly realistic aircraft. Use free-form fuselage and wing editor tools and tune your engines to recreate aircraft from any era or design your own.
- 3

Mars First Logistics
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Build physically simulated rovers to transport awkwardly shaped cargo across the rugged terrain of Mars. Earn funds, unlock new parts, and use your ingenuity to help the Martians establish a new home. Playable solo or in online co-op!
- 4

Mini Airways - ATC simulator
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Mini Airways is a real-time management game where you play the role of an air traffic controller. Clear your aircraft to takeoff & land, direct them to the destination...and most of all don't let them crash!! London, Tokyo, Shanghai... Test your ATC skills in distinctive maps around the globe!
- 5

SimplePlanes 2
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation and Early Access with Aviassembly.
SimplePlanes is back! Build planes, cars, or anything else using powerful procedural parts! Explore detailed environments with friends in multiplayer, cause chaos, or download 1,000,000 community crafts for free.
- 6

Kerbal Space Program
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 7

Air Traffic: Greenlight
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Air Traffic: Greenlight is an air-traffic-control-themed game. Direct aircraft in the area where radar coverage is limited. Prevent collisions, organize and expedite the flow of air traffic.
- 8

Nuclear Option
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation and Early Access with Aviassembly.
Fly near-future aircraft with immersive physics on intense battlefields, facing land, air and sea threats. Wage war against AI or other players with an array of potent weapons. Wield tactical and strategic nuclear weapons, capable of annihilating anything in their path.
- 9

Trailmakers
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Build the ultimate vehicle and explore a vast open world filled with challenges and adventure. Play solo or team up with friends in multiplayer to conquer the toughest obstacles. With a thrilling campaign mode and endless creative possibilities, Trailmakers is the ultimate sandbox for adventurers.
- 10

Main Assembly
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions.
- 11

TasteMaker
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
TasteMaker is a restaurant tycoon game. Design your own restaurant from the ground up, decorate, create a menu, hire and manage staff, and much more. Keep your customers happy and make a profit to keep the restaurant of your dreams from turning into a nightmare.