Level skip
 
 Turn Lara exactly North according to her compass, then enter the
 inventory   screen. Highlight the "Load Game" selection, press H, E,
 L, P, then exit   the inventory screen. Note: An easy way to have
 Lara face exactly North is   to have her hang or stand on something
 facing North. Then, press Select to   enter the inventory screen and
 your compass should be transparent to   confirm she is facing exactly
 North. -From: yohannes@netexecutive.com 
 
 All weapons, infinite ammo, medipacks
 
 Turn Lara exactly North according to her compass, then enter the
 inventory   screen. Highlight the "Small Medipack" selection, press
 G, U, N, S, then   exit the inventory screen. Note: An easy way to
 have Lara face exactly   North is to have her hang or stand on
 something facing North. Then, press   Select to enter the inventory
 screen and your compass should be transparent   to confirm she is
 facing exactly North. -From: yohannes@netexecutive.com 
 
 All items
 
 Turn Lara exactly North according to her compass, then enter the
 inventory   screen. Highlight the "Large Medipack" selection, press
 W, E, A, P, O, N,   S, then exit the inventory screen. Note: An easy
 way to have Lara face   exactly North is to have her hang or stand on
 something facing North. Then,   press Select to enter the inventory
 screen and your compass should be   transparent to confirm she is
 facing exactly North. -From:   yohannes@netexecutive.com