Amnesia: The Dark Descent Cheats

Unlimited Health, Oil, and Sanity
To activate these codes, you need to find your save files in a folder something like (C:/Computer/My Documents/Amnesia/Main/) and then click on your profile name. Open the save file you wish to alter with notepad, and press ctrl+f. Then, search one of the things (Health, Oil, Sanity) and look for the command streams below. Once the command stream is found, edit the number at the end (ex. edit to then just load up that specific save file and the amount you entered should be granted to you.

Unlimited Health: <var type="3" name="mfHealth" val="9999.000000" />
Unlimited Oil: <var type="3" name="mfLampOil" val="9999.000000" />
Unlimited Sanity: <var type="3" name="mfSanity" val="9999.000000" />

Endings
Bad Ending: Wait for Alexander to open and enter the portal.
Good Ending: Wait for Alexander to open up the portal. Once it opens place Agrippa's head into it.
Revenge Ending: While Alexander is waiting for the portal to open push over the three pillars that are giving it energy.

Super_Secret.rar Password
There is a rar file named "Super_Secret" in the "redist" folder of amnesia that has a password. In order to view the files inside you need a combination of the 3 endings. Each ending gives you a different part of the password, and when put together you can view the files inside. Below are the pieces you receive from each ending, and the completed password. Revenge ending: lke271 Bad ending: tyr299 Good ending:odn314 Combining them gives you the password of: lke271tyr299odn314