There are six alternate endings: rise to surface (good and evil), abandoned (good and evil), and the standard ending (good and evil).
Good endings Rescue all Little Sisters that you dealt with and spare Grace Holloway, Stanley Poole, or Gilbert Alexander.
Good endings Rescue all Little Sisters That you dealt with and kill Grace Holloway, Stanley Poole, and Gilbert Alexander.
Standard endings Rescue at least one Little Sister and harvest at least one Little Sister. Choose to die at the end and spare Grace Holloway, Stanley Poole, and Gilbert Alexander.
Standard endings Rescue at least one Little Sister and harvest at least one Little Sister. Choose to die at the end and kill Grace Holloway, Stanley Poole, or Gilbert Alexander.
Bad endings Rescue at least one Little Sister and harvest at least one Little Sister. Choose to live at the end and spare Grace Holloway, Stanley Poole, and Gilbert Alexander. Alternately, harvest all Little Sisters that you dealt with and spare Grace Holloway, Stanley Poole, and Gilbert Alexander.
Bad endings Rescue at least one Little Sister and harvest at least one Little Sister. Choose to live at the end and kill Grace Holloway, Stanley Poole, or Gilbert Alexander. Alternately, harvest all Little Sisters that you dealt with and kill Grace Holloway, Stanley Poole, or Gilbert Alexander.
Before you fight the second Big Sister (if you are harvesting ADAM but saving the girls), you will get an Enrage Plasmid. There are two bodies to scrounge ADAM from. One is more easily securable, which has a security camera, a rocket launcher bot, and a large puddle of water in this area. The Big Daddy comes back multiple times. If you drop off the little girl in her hole near here, you can wait for the Big Sister to show up. Then, enrage the Big Daddy so that he will take on and kill the Big Sister. Your only concern will be Splicers and the Big Daddy after he is done with the Big Sister.
When facing a Rumbler (Big Daddy with rockets) use Telekinesis to grab the rockets it fires then turn them back towards it.
Get your first Little Sister in Ryan Amusements. She will take you back into the main hall of Ryan Amusements to collect ADAM. While she is collecting ADAM, Splicers will attack and break down the door to the next section. Go through door to find a desk on the left with an animatronic Andrew Ryan behind it. Near a cabinet that is behind him is a golf club. Use Telekinesis to pick up the club, then shoot it at the Andrew Ryan animatronic.
Hack a vending machine and stop the needle in the blue section to get free ammo or a free Eve. When the same thing is done at a health station you can get a first-aid kit.
Locate a hackable vending or health machine next to or near a Bot Shutdown Panel. Hack the machine and stop the pointer on the red to activate the Security Bots to come for you. Quickly turn and snap the camera on one then shut them down at the panel. The disabled bot is still highlighted by the research camera and you can research Security easily.
Use the following trick to use Telekinesis to pull normal items toward you without using any of your Eve reserve. Eve is only used when you release the trigger and throw an item with Telekinesis. Use Telekinesis to pull items such as ammunition or first aid kits toward you to collect without wasting any of your meter. Note that if you take an item that you are already maxed out of, you will be stuck holding it with Telekinesis or release the trigger to throw it and waste your meter. However, if you display the Plasmid wheel and select another Plasmid attack, you can release the trigger to drop the item without Telekinesis automatically throwing it. By doing this you will not waste any of your meter dropping an item that you cannot carry. This also can be done when pulling electrified trip wires out of walls. To do this, pull the item toward you with Telekinesis and without releasing the trigger, display the Plasmid wheel to select another plasmid. When you close the Plasmid wheel and release the trigger you will drop the item.
Hack Security Bots when they appear after an alarm is triggered. They will remain in the area and fight for you. Note: Try stunning them with an electric attack first. There is an easy way to collect Security Bots to fight with you. First, locate a Bot Shutdown Panel that is quickly accessible near a vending machine. Hack the vending machine, but stop the pointer on the red to activate the Security Bots to come for you. Quickly run to the Bot Shutdown Panel and throw the switch. Then, locate a deactivated Security Bot and hack it. That Bot is now aiding you. Note: You can only have two Security Bots aiding you at one time.
Reach the given rank to unlock each bonus or item.
| Unlockable | How to unlock
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- Mask: Eagle/Tragic Comedy
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- Mask: Moon/Indigo Feather
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- Mask: Peacock Feather/Sun God
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- Mask: Rabbit/Goat/Pink Feather
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- Melee: Crowbar/Flashlight
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- Melee: Machete/Rolling Pin
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- Melee: Mallet/Barbed Wire
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- Melee: Wrench/Candle Stick/Pipe
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- Plasmid: Electro Bol/Winter Blast/Incinerate
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- Tonic: Expert Researcher/Security Evasion
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- Tonic: Speedy Recovery/Eve Saver
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- Upgrade: Crossbow Damage Increase
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- Upgrade: Crossbow Rate of Fire
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- Upgrade: Elephant Gun Damage Increase
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- Upgrade: Elephant Gun Sniper Scope
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- Upgrade: Grenade Launcher Homing Grenades
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- Upgrade: Grenade Launcher Velocity Boost
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- Upgrade: Machine Gun Kickback Reduction
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- Upgrade: Machine Gun Magazine Size
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- Upgrade: Nail Gun Damage Increase
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- Upgrade: Nail Gun Magazine Size
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- Upgrade: Pistol Automatic Firing
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- Upgrade: Pistol Damage Upgrade
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- Upgrade: Shotgun Automatic Reload
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- Upgrade: Shotgun Rate of Fire
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Complete the following achievements to unlock Microsoft Gamerscore points.
| Achievement | How to unlock
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- "Mr. Bubbles-- No!" (20 points)
| - Take down your first Big Daddy in a non-private match.
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| - Paid your respects to the founder of Rapture.
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- Adopted a Little Sister (5 points)
| - Adopted a new Little Sister for the first time.
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- Against All Odds (30 points)
| - Finish the game on the hardest difficulty level.
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| - Find or purchase all 11 basic Plasmid types.
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- All Weapon Upgrades (20 points)
| - Find all 14 Power to the People weapon upgrades in the game.
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- Big Brass Balls (25 points)
| - Finish the game without using Vita-Chambers.
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| - Spend 2000 dollars at Vending Machines.
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| - Buy one Plasmid or Tonic Slot at a Gatherer's Garden.
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- Choose the Impossible (50 points)
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- Confronted Grace (10 points)
| - Confronted Lamb's lieutenant in Pauper's Drop.
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| - Killed an enemy with its own projectile.
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| - Found your way back into the ruins of Rapture.
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- Dealt with Every Little Sister (50 points)
| - Either Harvest or Save every Little Sister in the game.
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- Defeated the Preacher (20 points)
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- Disgusting Frankenstein (10 points)
| - Become a Big Daddy for the first time in a non-private match.
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- Distance Hacker (5 points)
| - Used the Hack Tool to hack an object at a distance.
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- First Research (5 points)
| - Research a Splicer with the Research Camera.
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- Found Lamb's Hideout (20 points)
| - Gained access to Lamb's stronghold.
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- Fully Upgraded a Plasmid (10 points)
| - Fully upgrade one of your Plasmids to the level 3 version at a Gatherer's Garden.
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- Fully Upgraded a Weapon (10 points)
| - Install the third and final upgrade to any of your weapons.
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| - Defeat 3 Big Daddies without dying during the fight.
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- Heading to the Surface (25 points)
| - Headed to the surface on the side of Sinclair's escape pod.
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- Look at You, Hacker (15 points)
| - Killed 50 enemies using only hacked Security.
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- Man About Town (10 points)
| - Play at least one non-private match on each multiplayer map.
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- Master Gatherer (30 points)
| - Gather 600 ADAM with Little Sisters.
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- Master Hacker (20 points)
| - Hack 30 machines at a distance with the Hack Tool.
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- Master Protector (15 points)
| - Get through a Gather with no damage and no one getting to the Little Sister.
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- Max Plasmid Slots (10 points)
| - Fully upgrade to the maximum number of Plasmid Slots.
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| - Save your first Little Sister in a non-private match.
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- Nose for News (20 points)
| - Uncovered the secret of Dionysus Park.
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- One Research Track (20 points)
| - Max out one Research Track.
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- Prolific Hacker (20 points)
| - Successfully hack at least one of every type of machine.
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| - Defended yourself against Lamb's assault in the train station.
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- Proving Grounds (20 points)
| - Win your first non-private match.
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- Rapture Historian (40 points)
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- Research Master (20 points)
| - Max out research on all 9 research subjects.
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| - Reunited with your original Little Sister.
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| - Saved every Little Sister and spared Grace, Stanley and Gil.
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- Sinclair's Solution (20 points)
| - Joined forces with Sinclair in Ryan Amusements.
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| - Kill 30 enemies using only Traps.
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- Two-Bit Heroics (10 points)
| - Complete your first trial in a non-private match.
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| - Defended yourself against the Big Sister without dying.
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- Unnatural Selection (10 points)
| - Score your first kill in a non-private match.
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- Upgraded a Weapon (10 points)
| - Upgrade any weapon at a Power to the People Station.
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- Welcome to Rapture (10 points)
| - Complete your first non-private match.
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Fully research the Houdini Splicer. Have Natural Camouflage equipped. Just before the final battle, remain idle and you will become invisible. No one will attack. Do not move or you will become visible again, everything will attack, and you cannot turn invisible while being hit. Eventually Eleanor will say she can fight. Immediately summon her. She will distract and fight everyone, allowing you to turn invisible. She will eventually kill everyone so that you can escape.
More Cheats, Tips, Secrets & Walkthroughs
