OpenTTD is an open source 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.
OpenTTD is licensed under the GNU General Public License version 2.0.
OpenTTD is modeled after the original Transport Tycoon game by Chris Sawyer and enhances the game experience dramatically.
Many features were inspired by TTDPatch while others are original.
review from http://www.ixibo.com/