

Your machine will have to be able to run in multiple cycles without creating a collision.

The basic gameplay is about designing a machine that takes basic chemical elements for input, runs them through a mechanical loop wherein a number of machines create and break chemical bonds to form molecules, and then it drops those molecules off in output, and cycles back to the input. SpaceChem is a good game for people that like making machines, that like engineering, that like visuo-spatial puzzles, and that like solving problems that have more than one right answer (allowing your solutions to be as elegant or over-complicated as you want them to be). It has more in common with puzzle games like The Incredible Machine, though it's still different from that.

Though I mention Tetris, SpaceChem plays nothing like that. SpaceChem is a puzzle game as well, and a rather brilliant puzzle game at that. HOWEVER, remember that Tetris also probably looked and sounded pretty boring too, when you first saw it. Most all the traditional methods for sparking people's interest in a game fail for SpaceChem (except it is well received by critics, with an 84 on metacritic). It's a game about chemical engineering where the only graphics are chemical diagrams made with lines and circles. I'm making this thread because SpaceChem is an incredibly well designed game, but it is easily looked over: it looks boring in a screen shot, boring in a video, and boring in a two sentence description.
