Design Disc Code:
When at the part of the game where this sound is heard after pushing the shelf, enter "367204" as a code.

Get the third Energy Key Card early:
Before leaving the jungle, you can retrieve the card from the shallow stream. This way you will not have to make a return trip after finding out that it is needed.

Puzzle Preview:
When at a puzzle, before changing it, around push the button. Nothing will happen, but if you watch the colored lights they will turn on in the order needed to solve the puzzle.

Shutters:
Since the dinos can not pass through a shutter, use them to your advantage. Close each shutter after you pass them. This way, if a dino appears in that particular area, you can not be attacked (unless, of course, you are on the same side as the dino).

Save Ammo:
There are some areas that you will only pass through once or twice in the entire game. Killing the dinos in these areas is pointless; more importantly, it is a waste of ammo. Use the weakest tranquilizer dart on it/them, and move on. This way, the bullets/shells/slugs/grenades are available when you need them. Once you get unlimited grenades (by completing the game three times under the normal difficulty setting), you can kill those dinos, without wasting ammo.

View Ending 3 without agreeing with Rick:
It is possible to get Ending 3 after agreeing with Gail. When the game prompts you to agree with Rick or Gail at the end of the game, choose Gail`s decision to go after Dr Kirk. After the intermission sequence, go out the main door of the room. Go across the room to the double doors that lead to the Central Stairway. Once in the Central Stairway, if you have the infinite grenade gun, kill the two dinos in the room. If you are low on ammo and do not have the infinite grenade gun, try to run around them and not get hit. Go all the way to the end of the hallway to the Security Level A door. Go through that door, which leads to the Port Transport Passageway. Get on the slider and go across to the other side. When you get there, get off of the slider and go through the large sliding door to the Heliport Transport Passageway. Get onto the new slider and go across to the other side of this area. When you arrive, you should see a large door in the middle of the wall in front of you and a small Security Level A door to the right of it. That door leads to the Underground Heliport. Enter the Underground Heliport through the Security Level A door as the Large one will not open. Walk forward until you see a sequence that shows the helicopter. When you regain control of Regina, exit the Underground Heliport. Go back across the slider closest to the Underground Heliport. When you arrive back at the other side, do not go through the large sliding door to your right. Go through the large door in front of you. The room you enter is the Transport Passageway, not the Port Transport Passageway. Be careful, as a dino will attack you. Kill the dino, then walk forward until you reach the Security Level A door that is on the right of the screen. Enter through that door, which leads to the Special Weapons Storage. You will find Gail and Dr.Kirk. The intermission sequence will take you back to the Underground Heliport. When it completes, go back out the door to the Heliport Transport Passageway. After that intermission sequence, kill the T-Rex. When he is defeated, Ending 3 will play and you have successfully viewed it without agreeing with Rick.

Secret Ending
Having trouble finding the 3rd ending? If you've played through to the end and chosen both Rick's and Gail's choices, then here's the final ending you're looking for. Have a feeling you've been through the game without visiting a few doors? You have. Three, to be exact. If you want to find it, you can simply access one of the Level A doors after you've chosen Rick or Gail's decision. All of the unexplored level A doors lead to the same tunnel system. Simply follow it the secret heliport, then check your map and visit the red room. The red room will vary for each choice, so make sure to check.

Lounge safe combo
The combo for the lounge on the 2nd floor is 8159

Operation Wipeout Mode
To unlock Operation Wipeout, beat the game in under 5 hours or save less then three times or don'r use any continues

Management office safe combo
0426-Combo for the safe in the Management Office

Paul Baker's ID number
59104-ID for Paul Baker

John Doyle's ID number
57036-ID for John Doyle

Gas Experiment Room keycode
7248-Access code to unlock Gas Experiment room

B1 Library computer code
3695-Access code for computer in the library Room on floor B1

Stabilizer Experiment Room case combo
1281-Combo for the case in Stabilizer Experiment Room

Parts Storage computer code
364204-Access code for the computer in the Parts Storage Area

Stabilizer Design access code 1
0367-Access code for 1st computer in Stabilizer Design Room

Stabilizer Design access code 2
0204-Access code for 2nd computer in Stabilizer Design Room

Security Pass Room computer code
31415-Access code for computer in Security Pass Room

Secuity Pass Room keychip code
0392-Access code for Key Chips in Security Pass Room