Diamond City is one of the key locations in the game. Although the area that the town occupies is not large, there is a secret, a curiosity, or a quest in every corner. You can accept a dozen-or-so main quests and side quests, replenish your supplies and even buy a house.
After you complete one of the main plotlines (all of the quests for one of factions), in the town you can meet representatives of that faction, and also flags on flagpoles change.
While visiting the town in various points of the storyline, you can witness to several situations that start side quests.
At the moment, when the in-game date corresponds to Christmas, or to Halloween, the market place will be properly adorned.
Around the market place, there are four bases, just like in baseball. If you run around sufficiently fast, you will be rewarded with an additional achievement.
In the town there are two message boards. The first one is to the left of the Swatters , and the other one in Dougout . Thanks to them, you can receive random quests of, e.g. eliminating a group of enemies, such as super mutants or gunners.
1. Mayor's office. Here, you can find a console that you can use to summon the elevator. It takes you up to the mayor's office. You can also get there on the elevator from the external side of Diamond City.
2. Colonial Taphouse. As soon as you enter the bar, you will witness a tiff between spouses. When you meet Paul Pembroke later on, you can start quest Diamond City Blues. You can barter with the owner Cooke. He sells various liquors. In front of the building, there are several umbrellas and next to them, you can meet robot Wellingham. He sells basic liquors.
3. Codman Residence. This building is locked with an advanced lock. After you break in, you will be automatically attacked. Here, you find few valuable items.
4. Hawthorne Residence. The building is locked with an advanced lock. After you break into it, you will be attacked by all the inhabitants. The entire house is devoted to cats and you find tens of them here. Apart from that, there is nothing valuable here.
5. Latimer Residence. The building is locked with an advanced lock. After you enter, you will automatically be attacked by the two inhabitants, including an immortal one.
6. Cooke Residence. The building is locked with an advanced lock. Inside, you find a big number of meds and Nuka Cola Quantum.
7. Publick Occurrences. This is a newspaper that is managed by Piper. You can take from there all of the valuable items, with impunity.
8. All Faiths Chapel. It is a small chapel. After you sit on the bench, you receive a +5% bonus experience points that you gain, for the duration of 8 hours.
9. Power Noodles. From robot Takahashi, you can buy noodles.
10. Security Office. Inside, you encounter several guards.
11. Kellogg's House. You visit this building in one of quests in the main storyline. Under the desk, there is a button that opens door to a hidden room.
12. Choice Chops. Here, you find Polly, who sells meat. Next to here, there is her house that is locked with a novice lock. Upstairs, there is a meat stash, also locked with a novice lock.
13. Super Salon. Here, you meet John, and he can change your hairdo (the cost is 15 caps). In the corner of the room, there is the entrance to his house.
14. Mega Surgery Center. In the building, you meet doctor Sun, who can sell you meds and heal you. In the corner of the room, there is the basement entrance, where you can find some meds. Watch out, because you will be attacked by guards and inhabitants of Diamond City, after you break in. In the center of the building, you find Doctor Crocket, who can change your face for 100 caps.
15. Chemi-I-Care. In the small recess, you meet Solomon. From him, you can buy all sorts of drugs and meds. Also, you can take a short quest from him.
16. Fallon's Basement. In the small basement, you meet Becky, from whom you can buy various items, predominantly clothes, meds and junk.
17. Swatters. Here, you encounter Moe, who can task you with a quest, and who you can also barter with. He mainly sells baseball gear, including several interesting bats. Next to the stall, there is Sheffield sitting. You can give him a Nuka Cola, after which you can offer him a job in one of your settlements.
18. Commonwealth Weaponry. The name of the man at the counter is Arturo. From him, you can buy lots of good weapons, including a legendary version of Fat Boy. Also, he has lots of armors and ammo.
19. Diamond City Surplus. Here, you meet Myrna, who barters in virtually anything. It is possible that using your Charisma, you will have to convince her that you are not a synth. In her house, you find robot Percy, who also trades in virtually anything.
20. Home Plate. This building can be your home in Diamond City, as long as you can pay 2000 caps to Geneve, who is in the Mayor's office . This is not a fully functional settlement, and you cannot build here anything you want, nor assign companions.
21. Dogout Inn. A local bar. Behind the counter, there is Vadim, who can sell you food and alcohol. You find a similar range of goods in Scarlett. From Yefim, you can rent a room (the cost is 10 caps).
22. Warehouse. The building is locked with a novice level lock. Inside, you find lots of ammo and meds.
23. Science! Center. In the building, there are several most useful workbenches. Doctor Duff can take you with him in a short quest.
24. Diamond City Radio. Inside the small trailer, you meet Travis, whose responsibility is to broadcast the most popular radio in the Commonwealth.
25. Sheng Kawolski's House. Here, you meet a small boy that gives you a quest, in which you need to clear 5 water pumps. From him, you can also buy pure water.
26. By the Northern wall of the stadium, you meet Abbot, who is painting the wall. From him, you can receive quest Painting the Town.
27. Greenhouse. From inside, you can collect all of the valuable items, however few they are.
28. Valentine Detective Agency. This is the detective agency office that is run by a synth Valentine. Here, you either start or end several main and side quests. When it comes to the latter, you can start them by collecting case files from desks and shelves. On the desk, by which Nick is sitting, there is an issue of Robco Fun.
29. Schoolhouse. On the ground floor, you find an issue of Live and Love.