ALT + F4  ....pressed together closes tomb4.exe

Arrowkeys ....move Lara around

ALT Gr    ....jump/swim

CTRL/Strg ....interact with environment

SHIFT     ....walk

the button to the left of SHIFT (which is a "-" on my keyboard, but might be something else for you) ....run faster

the button to the left of  the button to the left of SHIFT ("." for me) ....crouch

0 (on the NUMPAD) ....look around

SPACE     ....throw away torch