Train Graveyard Entrance: Minor area, connects to the Sectory 7 Undercity Station area. You'll only use this to transition back to the Sector 7 Slums after Chapter 12.
Sectory 7 Undercity Station: Connects to the Pillar Plaza area. You'll exit the train here at the start of Chapter 3, and you'll catch another train here at the end of Chapter 4 to transition to Chapter 5. In the clearing to the west you'll find an item shop which sells an uninspired collection of consumables as well as the 4. Barret's Theme Music Disc. At the start of Chapter 12 you'll fight the Enigmatic Spectre and Mysterious Spectres here.
Pillar Plaza: Connects to the Gate (south), Pillar (northeast), Abandoned Factory (northwest) and Residental Area (west), the the Gate being a minor area with little gameplay significant and the Pillar not being accessible until Chapter 12.
Pillar: Where the majority of Chapter 12 takes place. The enemies fought on the Pillar in Chapter 12 are not recorded here, as you do not have the freedom to explore the Sector 7 Slums.
Residential Area: The main area of Sector 7, it's here you'll find most of the interesting NPCs (including the quest-giver Wymer and Chadley, who will give you Battle Intel Reports) shops (including two item shops and a weapon/armor shop) and unique locations like Seventh Heaven (where you can participate in the Darts minigame). You'll also visit this area in Chapter 12 and Chapter 13, but in the former case there's no fighting, questing or looting to be done, and in the latter case you're just passing through on your way to another area.
Scrap Boulevard: Along with the Abandoned Factory, Scrap Boulevard is one of the few areas in the Sector 7 Slums that hosts respawning enemies, in this case Gorgers and Wererats. You'll need to come here with Tifa to clear out some enemies, after which you can come and go as you please, and it's one of the best early-game grinding spots... just a shame you have relatively little materia worth leveling up by Chapter 3. You'll also need to come here during the quest On the Prowl.
Shops / Vending Machines
Sector 7 Undercity Station Item Shop
|4. Barret's Theme (Music Disc)||50|
Sector 7 Residential Area Item Shop
|1. The Prelude (Music Disc)||50|
|Deadly Dodge Materia||600|
Sector 7 Residental Area Weapon Shop
You'll be able to start quests after clearing Scrap Boulevard with Tifa. After returning to Biggs and Wedge she'll prompt you to pay a man named Wymer a visit, who will unlock the side quests in Chapter 3.
|Chadley's Report||--||West of the Weapons Store||500 Gil, Unlock Auto-Cure Materia, more Battle Intel missions|
|Rat Problem||--||Item Store||5 Hi-Potions|
|Nuisance in the Factory||--||Scrap Dealer - North of Seventh Heaven||500 Gil|
|Lost Friends||--||Betty - Childrens Park to the southeast of the Weapons Store||Maiden's Kiss|
|On the Prowl||Complete Rat Problem||Wymer - West of the Weapons Store||Elixir|
|Just Flew in from the Graveyard||Complete Nuisance in the Factory||Pillar Plaza||Star Bracelet|
Battle Intel Reports
After talking to Wymer and starting Chapter 3's side quests you'll be able to talk to Chadley, who will give you one such side quest, Chadley's Report, which also doubles as the first Battle Intel Report. Complete it and he'll give you Battle Intel Reports 02-04.
|Monster Bio Pt. 1||Assess 2 enemy types||Auto-Cure Materia|
|Magic Elements Pt. 1||Strike an enemy's weakness to Fire, Ice and Lightning||Wind Materia|
|The Stagger Effect Pt. 1||Use unique abilities on staggered enemies and charge the ATB gauge 10 times||First Strike Materia|
|The Stagger Effect Pt. 2||Stagger 15 enemy types||ATB Boost Materia|
|Cerulean Drake||Chapter 3||Abandoned Factory|
|Doomrat||Chapter 3||Residential Area|
|Elite Security Officer||Chapter 3||Municipal Storage Area|
|Enigmatic Spectre||Chapter 4||Residential Area|
|Gorger||Chapter 3, Chapter 4||Abandoned Factory, Scrap Boulevard|
|Guard Dog||Chapter 3||Municipal Storage Area|
|Hoodlum||Chapter 3||Residential Area|
|Lesser Drake||Chapter 3||Abandoned Factory|
|Mysterious Spectre||Chapter 4||Residential Area|
|Security Officer||Chapter 3||Municipal Storage Area|
|Wererat||Chapter 3, Chapter 4||Abandoned Factory, Scrap Boulevard|
|Wrath Hound||Chapter 3||Scrap Boulevard|