Engineering, Construction, Exploration and Survival in Space. How does that not sound awesome?

Crafting, looting, survival, a large variety in weapons, zombies, f2p, multiplayer, easy to run. Come on, how are you not downloading this game yet?

Classic. Don't think this game will ever completely die. It's a real sandbox, you can fight zombies or build cars and race them.

You can actually build suspension bridges in this game. This should be enough incentive to get it. Also it has a very charming atmosphere.

Great building game, but even better simulation. After you've built your prison you can just watch people do their thing for hours. It's fantastic.

Great exploration/base building/crafting/looting/digging sidescroller with realistic water physics. Your base can even have a dam for crying out loud.

A little broken but so much fun! Very good soft-body physics and the driving physics are pretty good too. Price is high, but it's a unique experience.

This is basically KSP for psychopaths. It's great. You can build siege weapons, vehicles and lots of other odd contraptions and destroy castles with it.

This game allows you to build almost anything you want in MultiPlayer. Like self balancing motorcycles, elevators, monorails, cars or flying creations.