A savegame file

Savegame is a file with extension .sav containing previously played and saved singleplayer or multiplayer game. It can be loaded later to play in both singleplayer and multiplayer without any data loss.

OpenTTD is compatibile with most TTD, TTDPatch and previous versions of OpenTTD savegames, which will be converted to OpenTTD format. More details on Interoperability.