LSD is a file extension that is used by a simulation game called FIFA World Cup. It is a very popular title that allows players to play soccer matches. The game was developed by Electronic Arts, and since the beginning, about 30 titles of this series have been released.

LSD is a file used in older versions of the game to store internal data. It was not intended to be opened directly by the user. Currently, this format is rarely used and is considered obsolete.