Cheats:

 Only two usefull cheats are public so far, a leftover from the PSX
 version.

 Here is how to skip the current level:

 1. Let Lara stand still
 2. One step forth
 3. One step back
 4. Let Lara spin around three times to the right side
 5. One jump forth

 And to get all the weapons and full ammo:

 1. Walk one step forward
 2. Walk one step back
 3. Turn around 360 degrees three times
 4. Jump backwards

 When you play Tombraider 1 and the Unfinished Business (Gold) on a PC
 with a 3Dfx card you can see the FPS (frames per second) in the upper
 left corner if you hit the [F2] key.