Section 8
60 Achievements
1,250
Xbox 360
Mission Accomplished
Complete the campaign on any difficulty
30
How to unlock the Mission Accomplished achievement in Section 8 - Definitive Guide
You should begin the campaign on Hard difficulty, as it is anything but hard. With infinite lives, it is almost impossible to lose. The only sections you may lose are when you must protect something, and those might require one or two attempts, just to see where the attackers come from.
This should only take you around 2-3 hours to complete.
This should only take you around 2-3 hours to complete.
The difficulty achievements in this game stack, so just do your first play though on hard. When you finish the game, you'll get this as well.
See Over Achiever.