Alternate costumes:
 Successfully complete the game to unlock the 
 Army and Battle costumes for Regina. Successfully 
 complete the game a second time to unlock the 
 Ancient (caveman) costume. 
 
 Grenade gun:
 Successfully complete the game three times. 
 The grenade gun with unlimited ammunition will 
 be available at the start of the next game. 
 
 Operation: Wipe Out mode:
 Successfully complete the game with a time under 5:00:00. 
 
 
 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.
 
 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. 
 
 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. 
 
 Hint:
 
 Several times throughout the game, you'll be challenged 
 with DDK codes you will have to enter in order to gain 
 access to certain rooms. Each puzzle starts with a jumble 
 of letters on top and a code key on the bottom. Use the 
 code key to eliminate the corresponding letters up top 
 and form the password. 
 
 At times, shortcuts can be found throughout the building 
 in the form of air ducts. If you see an open air duct 
 anywhere, use it to cut corners to new areas and avoid 
 tough enemies. 
 
 Read every document you come across. Just about every 
 piece of readable paper contains some sort of passkey, 
 tip for mixing medical supplies, or insight into what