

If Lara's health is at 100% full then the code won't work. You will have to lose some health first. Also make sure you have only ONE Small Medipack. Enter the inventory and highlight the Small Medipack. Press the "0" button at the top of your keyboard (not the Num Lock one). You should see the text under the Small Medipack changed from 1x Small Medipack to Small Medipack. Press the Enter button and re-enter your inventory. Now it should say Unlimited Small Medipacks.
If Lara's health is at 100% full then the code won't work. You will have to lose some health first. Also make sure you have only ONE Large Medipack. Enter the inventory and highlight the Large Medipack. Press the "9" button at the top of your keyboard (not the Num Lock one). You should see the text under the Large Medipack changed from 1x Large Medipack to Large Medipack. Press the Enter button and re-enter your inventory. Now it should say Unlimited Large Medipacks.
Open your inventory, highlight Timex-TMX, hold B + I + T + S. Quit the game and the Special Features will be found on the Main Menu.
Open your inventory, highlight Timex-TMX and hold together: L1 + L2 + R1 + R2 + Down. Return to the inventory screen and now you will have the necessary keys and puzzle items.
Open your inventory, highlight Timex-TMX, hold L1 + L2 + R1 + R2 + Up. Return to the inventory screen and you will now have extra weapons with unlimited ammos plus unlimited medipacks and flares.
Open your inventory, highlight Timex-TMX, hold L1 + L2 + R1 + R2 + Down + Circle and press Triangle. Quit the game and the Special Features will be found on the Main Menu.
Open your inventory, highlight Timex-TMX, then hold the Y button until Secrets found changes to 36. Quit the game and the Special Features will be found on the Main Menu.