It's Not Easy Being Green

It's Not Easy Being Green is an overseer quest and part of the When Irish Eyes are Glowing multistage questline in Fallout Shelter.

Walkthrough
This quest takes place in a cyan building with a random layout and around seven floors, with most of the building below ground (see gallery for possible layouts). Enemies include mole rats, including mole rat broodmother, radroaches, including glowing radroaches, and feral ghouls.

The second room you enter has a settler you can speak to who will give you some information. There is a rare outfit recipe in this room. Around one level down is the Yellow Quarantine Zone that has two settlers and a friendly ghoul that can be spoken to. This room contains some caps and rad-away. A level or two below that is the Red Quarantine Zone, that has one settler and two friendly ghouls who can be spoken to. There is a rare junk and two Nuka-Cola Quantum in this room.

Near or at the bottom is the settlement leader, who has been transformed into a glowing feral ghoul accompanied by two more feral ghouls. Once defeated, a chemistry flask is rewarded. There is also a rare outfit recipe in this room.

Behind the scenes
The name of this quest is a reference to a quote associated with Kermit the Frog, derived from the song "Bein' Green."