OpenTTD

OpenTTD is an open-source game based on Chris Sawyer's Transport Tycoon Deluxe, with new features and improvements.

Developer Credits
Copying baseset/opentitle.dat to the saves folder and changing its extension to .sav enables the player to load the scene playing on the title screen. The map isn't much bigger than what normally can be seen, but outside the visible area the author left his signature made out of islands in the water. To find it, scroll down from the initial camera position or use the Find HQ button on the player's company window.