High Quality Content by WIKIPEDIA articles! SpaceChem is an indie puzzle game from Zachtronics Industries, loosely based on the principles of chemistry and chemical bonding. In the game, the player is tasked to produce one or more specific chemical molecules via an assembly line by programming two waldos that interact with atoms and molecules through a visual programming language. SpaceChem is the developer`s first foray into a commercial title after a number of free Flash-based browser games that feature similar puzzle-based assembly problems.