“A game where you build robots to complete various challenges such as transport, combat, and climbing. Earn parts by completing said challenges and collect resources to build better vehicles.”

“A fairly advanced vehicle builder where you use gears and belts to transfer torque from an engine that you create which is also pretty in-depth. Lego Technic if it was a video game.”

“In Airships you can design either airships or landships for use in multiplayer and singleplayer/co-op conquest.”

“Cosmoteer is a 2D game about designing starships to complete various missions across the galaxy for factions such as bounty hunting and combat or for mining and trading. Has an easy to use designer.”

“Besiege is a sandbox building game about designing various different siege engines to destroy castles and solve puzzles. Has a DLC for creating various naval vessels such as ships and submarines.”

“A game about surviving in a galaxy across various star systems and types of planets. Has a voxel-based building system to make your own spaceships that suit your needs for survival at the time.”

“From the Depths is a game about building ships, aircraft, and ground vehicles to take on various other factions. It has a complex designer along with in-depth weapon and engine creation.”

“Brick Rigs is a game about building cars, planes, and tanks with Legos. It is very easy to start off in but can be very advanced and detailed once you get the hang of it. Has multiplayer and combat.”

“Avorion is a Space Sim with a simple and easy to use voxel-based building system for ships. You have a randomly generated galaxy to explore filled with factions to trade with or fight.”

“In Stormworks you can build boats, cars, tanks, helicopters, and jets to complete various different mission types around a procedurally generated world. Can be complex. Has DLC for combat and space.”