Perfect Dark
20 Achievements
200
Xbox 360
Xbox One
Xbox Series
A Friend Indeed
Complete any mission in Co-operative Mode.
10
How to unlock the A Friend Indeed achievement in Perfect Dark - Definitive Guide
Wilmo, X
All you have to do for this achievement is get friend on XBL or in offline splitscreen and complete any of the missions on any difficulty (all levels in a mission). I would recommend Carrington Villa on agent as there is only one level and it is quick.