The creators took inspiration for The Prophecy from the works of the author H.P. Lovecraft. The Grey One in the game is homage to the author's own 'grey ones'.
The bodies of the natural enemies - wolves - disappear a moments after being killed.
Lara's movement set includes running, sprinting, jumping forward, back and side flips, sprint-jumping, shooting, shimmeying, and using switches and levers.
Sources
No. 01 'Tomb Raider: The Prophecy’ Strategy Guide by Prima Games