Reilly's Rangers (quest)

 is a Fallout 3 quest. It is also an Xbox 360 and PC achievement.

Objectives and walkthrough
Reilly's Rangers is a map service group in the wastelands of Fallout 3. There are five members of Reilly's Rangers.

This Quest can be started in two ways:

Exploring at the National Archives building near the Mall Northeast map marker, you will pick up the Ranger Emergency Frequency from Reilly's Rangers needing assistance.

You meet Reilly in Underworld, the Ghoul City situated in the Museum of History in D.C. (near the Washington Monument). Reilly was wounded by Super mutants on one of her excursions and is lying unconscious in the Underworld hospital. If you manage to wake her up (60 medicine skill) or convince the Doc to wake her up (speech skill), she will ask you to help her team of Rangers, which is trapped on a hotel roof not far away.

The quest rewards for this are either a suit of Ranger Body Armor (which can be repaired using any combat armor) and/or Brick's special mini gun: Eugene.

Note - Just take the armor as the quest reward. After the quest you can pickpocket Eugene from Brick. A stealth-boy can be very helpful if you have less than 100 sneak. Make sure you get to 100 sneak and have 8 or more agility. Otherwise you will get caught every time even with 100 sneak. Alternatively, if you don't care about a big negative hit to your Karma, you could kill Brick and loot Eugene.

Note - Reilly's directions to Statesman Hotel: "Using the Metro tunnels, head north from here to Metro Central. Then look for the tunnels to the Dupont Circle Station. Exit from Dupont Circle Station into the Dry Sewers and follow to Our Lady of Hope Hospital."

Despite Reilly's directions, an alternate (possibly easier) way to get there is to go to the Vernon Square North Station near Vault-Tec Headquarters. Go into the tunnels and head south to Vernon Square Station. Exit there and you will be in the plaza with the hospital and hotel.

Note - You can only reach the rooftop of the hotel by going through the hospital first. However, it would be wise to clear the entrance immediately inside the hotel as this will make the battle as you leave the building with the rangers much easier. After doing this, proceed to the hospital.

The Fission Battery required to repair the elevator can be found on the floor just bellow the roof. Follow the quest map indicator. Or you can just bring one. (Note: One can be found on your way through metro station in a back room. This room is located in the long hall, back right corner, before you reach the main platform. It takes an average skill of lock picking to unlock the door.)

After rescuing Reilly's Rangers and offering Reilly your help for their mapping service once you return to the Ranger Compound, she will give you a GeoMapper Module. As long as have the module in your inventory, it will record every new location you discover, for which Reilly will pay you in caps every time you return to the Ranger Compound and talk to her.

If you manage to get the Mapping Module early in the game, you will basically earn caps for every location you discover. It will also count for the locations you have already discovered before receiving it. Talk to Reilly again about it and she will pay you.