Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Butcher	Unknown.
Caravan Guard	Unknown.
Dead Head	Find "Dead Head" helmet.
Engineer	Unknown.
Glowing in the Night	Unknown.
Jack-Screw Person	Unknown.
Joker	Unknown.
Kazanova	Unknown.
Kleptozaur	Unknown.
Lone Rambler	Unknown.
Lucky Luke	Unknown.
No Mercy	Betray Fes.
Olympic Champion	Unknown.
Scrooge	Unknown.
Silent Thief	Pass "Mincer" underlabs without rising alarm.