Tomb Raider - Unfinished Business 3DFX.

To use the capabilities of the 3DFX card, simply copy the
'TOMBUB.EXE' file from within the '3DFX' folder on the CD
into the directory where the game has been installed
overwriting the original 'TOMBUB.EXE' file that was
installed.

Core Design Ltd
http://www.core-design.com

EIDOS Interactive
http://eidosinteractive.com