The guys over at OpenTTD have long been working on this awesome game.

OpenTTD is a clone of the Microprose game “Transport Tycoon Deluxe”, a popular game originally written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features.

It shouldn’t take a genius to work out that this game is also open-source, and will run on any operating system (well, most) - including Mac OS X and Linux (Debain/Ubuntu)! If more games like this were made, perhaps Linux and Mac would be more popular? Windows surely dominate the gaming market at the moment, but who knows what the future holds? ^_^