Siren Alley is the fifth chapter and one of the biggest locations of BioShock 2. This page contains a detailed map of the area and the first part of the Siren Alley walkthrough. Your character can get a useful Spear Gun, As well as new tonics and plasmids (e.g. Security Command plasmid for capturing devices). In Siren Alley, a stronger version of the Rumbler daddy also appears.
Audio Diaries: 20
Power to the People stations: 2
Little Sisters: 3
New weapon types: [Spear Gun]
New Plasmids: [Security Command], [Scout], [Incinerate! 2], [Winter Blast 2], [Hypnotize 2], [Cyclone Trap 2], [Insect Swarm]
New Tonics: [Handyman], [Proud Parent], [Hacker's Delight 2], [Cure All], [Vending Expert], [Electric Flesh], [EZ-Hack], [Medical Expert], [Security Evasion], [Walking Inferno]
01 - You wake up at the bottom of the ocean. Follow the path south, looking for snails (on the ground, wall and inside a pipe) that will give you some ADAM.
02 - Turn the lever and wait for the water to be pumped out. After going through the door, pick up the Audio Diary from the wall to the left.
AUDIO DIARY: [A Silent God] - Simon Wales
03 - You have the chance to see a new Big Daddy type - Rumbler - in action. This one uses mini turrets (an alternative ammo type for your [Hack Tool] and fires rockets. Despite the fact that you can try to avoid his attacks and hack his turrets, it's worth to take advantage of the fact that this particular type is quite lousy at close combat. You shouldn't use more than one health pack by equipping the Drill enhanced with proper Tonics and keeping the Daddy at close distance. Take over the first out of three Little Sisters. There's a lot of proper bodies in the area, so choose ones that are easy to defend and use the turrets.
NOTICE: You will receive a gift for rescuing four girls. By the nearest Gatherer's Garden you will find a teddy bear with the [Proud Parent] Tonic, 80 dollars and 80 ADAM.
04 - You will encounter Father Simon. He will quickly flee upon seeing you. Go up the stairs to the upper floor.
05 - Jump through the hole to the room in the middle of the square. Pick up the [Handyman] Tonic and an Audio Diary. Use Incinerate on the ice to get some more items. Exit by hacking the control panel by the door.
AUDIO DIARY: [Misbehaving] - Eleanor Lamb
06 - Use incinerate in the toilet at the back - pick up the Audio Diary.
AUDIO DIARY: [The Rumbler] - Gil Alexander
You will find three rooms on the floor. Two are opened - the casino and a room in which you will be able to activate turrets, causing a small slaughter. Collect the Audio Diary.
AUDIO DIARY: [Plasmid Shipment] - Jamie Byass
Hack the lock visible through the window to get inside the room on the upper floor. Jump through the hole in the floor, into a room with a Power to the People station inside. Don't buy any upgrades for now, as you will find a new weapon soon. Then you will be able to decide which upgrade suits you the most. Pick up the Audio Diary.
AUDIO DIARY: [Farther to Fall] - Augustus Sinclair
07 - Another present from Eleanor - the [Security Command] Plasmid. Activate the security bot and take control of the camera and turret which will help you in the fight. Go upstairs only to find out that the door is locked (you have to approach it). There's an Audio Diary next to the code lock.
AUDIO DIARY: [Lamb's Salvation] - Simon Wales
08 - Before you can reach the marked spot, you will have to defeat a Brute Splicer.
NOTICE: If you spared Grace at the Pauper's Drop level, you will receive a package containing some alternative ammo for your Hack Tool, Machine Gun and Shotgun.
Upon entering the room, you will find a new weapon - the [Spear Gun].
Now you can return to the Power to the People station and choose an upgrade. It's worth mentioning that the Spear Gun not only effectively nails your enemies to walls, but you can also retrieve the ammo shot from it. Take the Audio Diary from the room to the right (you will find the second one marked on this floor later on, while searching Daniel's body... but he doesn't necessarily have to fall victim to you right here).
AUDIO DIARY: [Father Simon Wales] - Daniel Wales
On the upper floor, besides a turret and an ADAM-filled body, you will find another Audio Diary.
AUDIO DIARY: [Double Standard] - Dusky Donovan