# Multiplayer unlockablesReach the indicated rank in Multiplayer mode to unlock the corresponding bonus:
Rank 1
Weapon: Pistol/Shotgun
Plasmid: Electro Bol/Winter Blast/Incinerate
Mask: Rabbit/Goat/Pink Feather
Melee: Wrench/Candle Stick/Pipe
Rank 2
Weapon: Machine Gun
Rank 3
Tonic: Expert Researcher/Security Evasion
Rank 4
Plasmid: Air Dash
Rank 5
Upgrade: Pistol Automatic Firing
Rank 6
Weapon: Grenade Launcher
Rank 7
Tonic: Speedy Recovery/Eve Saver
Rank 8
Plasmid: Geyser Trap
Rank 9
Upgrade: Shotgun Rate of Fire
Rank 10
Weapon: Crossbow
Mask: Eagle/Tragic Comedy
Melee: Machete/Rolling Pin
Rank 11
Tonic: Back Stabber
Rank 12
Plasmid: Telekinesis
Rank 13
Upgrade: Machine Gun Magazine Size
Rank 14
Weapon: Nail Gun
Rank 15
Tonic: Metabolic Eve
Rank 16
Plasmid: Houdini
Rank 17
Upgrade: Grenade Launcher Homing Grenades
Rank 18
Weapon: Elephant Gun
Rank 19
Tonic: Sabotage
Rank 20
Plasmid: Insect Swarm
Mask: Moon/Indigo Feather
Melee: Mallet/Barbed Wire
Rank 21
Upgrade: Crossbow Damage Increase
Rank 22
Tonic: Repairman
Rank 23
Upgrade: Nail Gun Magazine Size
Rank 24
Upgrade: Speedy Hacker
Rank 25
Upgrade: Elephant Gun Sniper Scope
Rank 26
Tonic: Slugger
Rank 27
Upgrade: Pistol Damage Upgrade
Rank 28
Tonic: Leg Up
Rank 29
Upgrade: Shotgun Automatic Reload
Rank 30
Tonic: Fast Feet
Mask: Peacock Feather/Sun God
Melee: Crowbar/Flashlight
Rank 31
Upgrade: Machine Gun Kickback Reduction
Rank 32
Tonic: Deadly Machine
Rank 33
Upgrade: Grenade Launcher Velocity Boost
Rank 34
Tonic: Headhunter
Rank 35
Upgrade: Crossbow Rate of Fire
Rank 36
Tonic: Big Game Hunter
Rank 37
Upgrade: Nail Gun Damage Increase
Rank 38
Tonic: Death Trap
Rank 39
Upgrade: Elephant Gun Damage Increase
Rank 40
Tonic: Resurrection
Mask: Octopus/Demon
Melee: Hatchet
# Door codes
Enter the indicated code to open the corresponding door:
Adonis Luxury Resort
Door near rubble with code written backwards on glass: "1540"
Pauper's Drop
The Clinic: "0047"
Siren Alley
Maintenance Area: "1919"
Dionysus Park
Power To The People weapon upgrade station door: "1080"
Fontaine Futuristics
Plasmid Theater: "5254"
Inner Persephone
Watch Tower: "2673"
Recreational Therapy: "4146"
# Easy health
Melee a health station, and a health kit will come out.
# Easy money
Find an area that contains a working slot machine. For example, in the Siren Alley level inside the Mermaids Lounge, go upstairs into the room on the right side of the balcony that contains the slot machines. As you enter the room, turn left, and play the right-hand machine of the two that are facing you. Save the game before you start, and resave it every time your total money increases above where you started. If the machine does not payout after about a dozen turns, reload your saved game. It is possible to max out your wallet in approximately ten minutes. Repeat this as many times as desired.
# Easy Security research
Find 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 alarm, thus triggering the Security Bots to come after you. Once you see them, quickly take a picture of one of them with the camera, then use the Bot Shutdown Panel to shut them down. The disabled bot will still be highlighted by the research camera, allowing you to research Security easily.
# Easy XP in Multiplayer mode
Have a friend join your game while it is in progress on any team-based game, putting him or her on the other team. Find a turret anywhere in the map, and make sure there is nobody around. You and your friend can hack the turret back and forth for 10 XP per hack. Repeat this as many times as desired. -From: Christian Manzi
# Easy final battle
Fully research the Houdini Splicer. Have Natural Camouflage equipped. Immediately before the final battle, remain idle, and you will become invisible. No one will attack as long as you do not move. If you move, you will become visible again, and all enemies will attack; you cannot turn invisible while being hit. Once Eleanor says she can fight, summon her. She will distract and fight everyone, allowing you to stay invisible. She will eventually kill everyone so that you can escape.
# Alternate endings
Successfully complete the indicated tasks to get the corresponding ending. There are six different endings: Rise To Surface (good and evil), Abandoned (good and evil), and the standard ending (good and evil).
Good endings
Save all Little Sisters you adopt, and spare Grace Holloway, Stanley Poole, or Gilbert Alexander.
Save all Little Sisters you adopt, and kill Grace Holloway, Stanley Poole, and Gilbert Alexander.
Standard endings
Save 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.
Save 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
Save 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 you adopt, and spare Grace Holloway, Stanley Poole, and Gilbert Alexander.
Save 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 you adopt, and kill Grace Holloway, Stanley Poole, or Gilbert Alexander.
# Free Telekinesis
Use the following trick to pull normal items toward you with Telekinesis and not use any Eve. Eve is only used when you release the button to 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 Eve. If you take an item you are already maxed out of, you will either be stuck holding it with Telekinesis or have to release the button to throw it and use some Eve. However, if you display the Plasmid wheel and select another Plasmid attack, you can release the button to drop the item without Telekinesis automatically throwing it. Thus, you will not use any Eve by dropping an item you cannot carry. This can also be used 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.
# Defeating Rumblers
When fighting a Rumbler (Big Daddy with rockets), use Telekinesis to grab the rockets it fires and throw them back at it.
# Power To The People weapon upgrade station locations
Power To The People weapon upgrade stations can be found at the following locations:
1. Ryan Amusements: Going to get the ticket.
2. Ryan Amusements: After the family display, through the door.
3. Pauper's Drop: From Journal 039, go out the door, down the stairs.
4. Pauper's Drop: In the back of skid row, in the limbo room. It is behind the stage
5. Pauper's Drop: After breaking into the hotel, when you are going through the halls, you will go through a hole. To the left is a blue sheet. To the right is the station.
6. Siren Alley: In Mermaid Lounge, go upstairs, and hack the gate. Then, drop through a hole in the floor.
7. Siren Alley: Just before Pump Station 5.
8. Dionysus Park: Behind the door; combination is "1080".
9. Dionysus Park: On the path to the train.
10. Fontaine Futuristics: After you destroy the flying Gil bot, you can enter where you gain access to the laboratory.
11. Fontaine Futuristics: After you turn on the lights, it will be in the bottom of the holding cells area.
12. Persephone Outer: On your left.
13. Inner Persephone: After you gain access to Sinclair, look back in the room.
14. Inner Persephone: Just after Ward B in the room with the rocket turret.
# Easy "9-Irony" trophy
After you 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, breaking down the door to the next part of the level. After going through the door, there will be a desk on the left with an animatronic Andrew Ryan sitting behind it, and near a cabinet behind him is a golf club. Use Telekinesis to pick up the club, then shoot it at the Andrew Ryan animatronic to get the "9-Irony" trophy.
