OpenTTD is an open source simulation game based upon the popular Microprose game "Transport Tycoon Deluxe". It attempts to mimic the original game as closely as possible while extending it with new features.
- bigger maps (up to 64 times in size).
- stable multiplayer mode for up to 255 players in 15 companies, or as spectators.
- autorail/-road build tool, improved terraforming.
- canals, shiplifts, aqueducts.
- larger, non-uniform stations and the ability to join them together.
- clone, autoreplace and autoupdate vehicles.