ExtrasSpecially marked boxes had a free "Lara Croft mousepad" enclosed. These were the same as the official ones released in 1997 that sold separately.
Millennium EditionThe Millennium Edition included a special preview of the Tomb Raider comic and a game card.
Times Exclusive LevelIn late 1999 a special bonus level was developed by Core Design and released together by Eidos and newspaper The Times. It is a standalone level built using Tomb Raider: The Last Revelation engine but not requiring the original game to play. This Times Exclusive Level was released to commemorate the 100th anniversary of discovery of King Tutankhamun's tomb. As of 2012, the level is still available online for free.
Information also contributed by Garcia and GTramp