OpenTTD is a business simulation game in which the player aims to earn money through transportation of passengers and freight by road, rail, water and air. The program is based upon the popular game Transport Tycoon Deluxe, written by Chris Sawyer for Microprose and attempts to mimic the original game as closely as possible while extending it with new features.
Note: Size mentioned herein includes all basic game graphic and sound sets (OpenGFX [graphics], OpenSFX [sounds], and OpenMSX [music]).