Metal Slug meets Monster Hunter. Craft ridiculous guns and take on the hoards of CLAW who get in your way. Fantastic art and music, co-op available.

Fantastically charming adventure, piracy, trading, combat, dancing and fencing. It has a lot to offer, and it does a good service to it all.

Surprisingly in depth and well made RPG with turn based tactical combat. Survive in the new world as a team of Conquistadors.

Nice puzzles that require a bit of thinking, but aren't unintuitive. Simple Braid-like controls and presentation.

Made by the team that made Nitronic Rush (available free) and very similar. Hyperfast futuristic time-trial racing game, close to Trackmania in concept.

Play with Shawn, Tom and Mack. Survival sandbox in a multiplayer server where anything can happen. In active development, but thoroughly playable.

Like much more hardcore Civ, EU4 tasks you with taking over the world in innumerable ways. Similar to CK2 and HOI3, but covers 15th-18th centuries.

The best turn based tactics game available on Steam. Get the Long War mod if you want something more in-depth and hardcore.

Sandbox rocket building game, limitless possibilities. Has a rough campaign mode, but you'll be making most of your own fun.

Slow paced but very rewarding city building game.