Warhammer 40,000: Dawn of War II
73 Achievements
2000
Xbox 360
Duty is its own Reward
Complete 6 Chaos Rising missions as a GUEST in Co-Op.
50
How to unlock the Duty is its own Reward achievement in Warhammer 40,000: Dawn of War II - Definitive Guide
Eternal, Hybridchld
Unlike Common Foe you must be the guest to get this one. Have a friend invite you to a game and play 6 missions and you'll get this. Once done invite the friend to a game and do the same for them.