Complete every story arc in Mercy Island to earn this badge. These arcs are:
Earning Arachnos' Favor given by Kalinda. (-4164, 163, -2982)
The Origins of the Snakes given by Matthew Burke. (-1180, 96, -394)
Snake Uprising given by Mongoose. (-1180, 96, -394)
Weird Science given by Doctor Creed. (-1891.5, 96, -1574)
Underdogs Never Win given by Operative Kuzmin. (-1219, 243, -88)
Fire and Heist given by Fire Wire. (-2726, 239, 139)
Higher Purpose given by Doctor Weber. (-1037, 239, 525)
Price of Friendship given by Lt. Harris. (-533, 98, -1295)
The Hearts of Darkness Ch. 1,2,&3 given by Dr. Graves (-1066, 239, -9)
Oh, Wretched Man! given by Seer Marino (-3042, 176, 1330)
(copied from info provided in Badger)