Single-player games like Aviassembly
Below are 12 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

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.
- 2

Juno: New Origins
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
- 3

Alembic
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
A falling-sand sandbox built on the **real periodic table**. Every element has genuine physical properties, and reactions emerge from real chemistry — rust iron, ignite thermite, run a galvanic cell, split a uranium pile to criticality. Discover it all in an encyclopedia that fills as you play.
- 4

Nimbatus - Drone Creator
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Use the Nimbatus Drone Creator to construct physically simulated drones and try them out in a virtual testing environment. Do you have what it takes to become a drone engineer?
- 5

WaggaSim
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation and Early Access with Aviassembly.
Take to the skies in the ultimate paragliding and speed-flying simulator. Experience lifelike physics, design or modify your own gear, and perfect your style: soaring, thermaling, acro, freestyle, and more. With soft-body wings that move like real fabric, the sky is no longer the limit!
- 6

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.
- 7

Rocket Science
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation and Early Access with Aviassembly.
Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.
- 8

InfraSpace
Single-player alternative to Aviassembly — playable solo, no multiplayer required. Shares Simulation with Aviassembly.
Create an extrasolar efficiency utopia from scratch! In this sci-fi city builder you need to start mining operations, plan production, and lay down transportation routes to ensure a smooth supply chain.
- 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

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!
- 12

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.