Building

Muck is a survival-roguelike. Collect resources, find items & build a base to survive for as long as you can.

House Flipper is a unique chance to become a one-man renovation crew. Buy, repair and remodel devastated houses. Give them a second life and sell them at a profit!

Dive into the Musical World of My Singing Monsters! Breed them, feed them, listen to them sing! Breed & collect a menagerie of Monsters, each a living instrument! Build your paradise across 35+ Islands, customize your world, and enjoy endless music! There's never a dull moment in the Monster World!

A highly customizable virtual stressball and physics sandbox about mutilating ragdolls in various ways using an overwhelming amount of weapons and tools.

Build and grow your very own computer repair enterprise as you learn to diagnose, fix and build PCs. With real-world licensed components and comprehensive hardware and software simulation, you can plan and bring your ultimate PC to life.

Kingdoms and Castles is a city-building simulation game about growing a kingdom from a tiny hamlet to a sprawling city and imposing castle. Make trade agreements, alliance, and war with neighboring AI controlled kingdoms. Each villager and resource is individually simulated.

Make your dream cars a reality with Automation’s unparalleled car and engine design tools. Gain a competitive edge through smart engineering and business decisions to help you build an automotive empire. Will you become an industry leader, or just a footnote in automotive history?

Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense Action-RPG. Includes Steam exclusive Portal gun & TF2 familiars!

Build your own Jurassic World. Nurture generations of dinosaurs with the series debut of juveniles, create and manage sprawling prehistoric parks around the globe, and let your imagination roar with powerful new creative options.

Manage a hotel and hire employees including Death, a dragon, a Spirit Hunter, and a bioroid maid. Build your wealth through various means and refine your strategies based on the predictions of Oracles. All employees can be romanced depending on your choices.

Beautiful Multiplayer Jigsaw Puzzle game where you can design the room you play in!

Build airplanes by snapping parts together, designing wing sections, and attaching engines. At any time, you can strap yourself into the cockpit and see how it flies with realistic physics. If you're not in the mood for building, over 100,000 airplanes are available to download for free.