OpenTTD is a business simulation game, which players try to earn money by transporting passengers, minerals and goods via road, rail, water and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe. OpenTTD duplicates most features of Transport Tycoon Deluxe and has many additions, including a range of map sizes, support for many languages, custom artificial intelligence, downloadable customisations, ports for several widely used operating systems, and a more user-friendly interface.

OpenTTD Web Port is licensed under the GNU General Public License v2.0 (GPLv2). Source code available at the official GitHub repository.