The creator of The Codex of Alchemical Engineering and Bureau of Steam Engineering (not to mention the grandaddy of Minecraft, Infiniminer) is back with a full-fledged indie game ready to provide a serious logic puzzle challenge. SpaceChem is anything but simple, anything but easy, and one of the most satisfying puzzle games released. If you can solve its challenges, that is. SpaceChem is a game you'll spend a few minutes learning but weeks trying to master, and its 50+ levels are more than enough to strain your poor brain matter more than it's been strained in quite some time.

Zachtronics Industries has come up with a new "Game for Engineers", and given its central concept you'd think playing it would blow up the space-time continuum. It's a computer game about programming computer chips. Though it may take some time to grasp its central concepts, Kohctpyktop: Engineer of the People is a rich and rewarding puzzle game.

Yes, that's exactly what cerebral puzzler The Codex of Alchemical Engineering needed. A longer title. Anyway, there are fifteen new brain-teasers here, created by both the author of the original game and its fans. When Zach (the author) says that this expansion may destroy the minds of those who haven't finished the first game, do not take his words lightly.

Fighting robots plus brain-taxing logic-style puzzles? Sounds like a winner! Bureau of Steam Engineering, from the author of The Codex of Alchemical Engineering, is a visually stark game of planning, building, testing, tweaking, and building some more. You are an engineer outfitting robots who are about to go into battle with deadly weapons. Using pipes and valves you must connect each mechanical part to an engine and ensure it functions properly before unleashing the machine.

The latest brilliant-yet-simple logic puzzle game to hit the Web goes by the intriguing title of The Codex of Alchemical Engineering. Called a "game for engineers" by its creator, your goal is to build machines out of mechanical arms that move and transform basic elements to create compounds required to pass each level. It's a cerebral puzzle game that tasks you with arranging and tweaking objects on both a small and grand scale, the final result of which is a burst of euphoric gaming bliss.