G.I. Joe: Operation Blackout
34 Achievements
Steam
Spring Cleaning
Complete Mission 14: "Undo What They Did to U.S.S." having defeated most enemies.
10.0%
How to unlock the Spring Cleaning achievement in G.I. Joe: Operation Blackout - Definitive Guide
This should come naturally without much trouble. I used roadblock on lowest difficulty solo mode and it unlocked as soon as the boss fight was done. The ai companion is useless so should be a guaranteed unlock.
I suggest doing all the level specific achievements on your easy run and/or with modifiers for a faster completion. Just kill everything as you progress and you shouldn't have any issues getting this to pop.
Just make sure you don't run past any enemies in this mission. Kill them all. There are many points you could just run through to the next objective, but you need to slow down and take everyone out for this one.
Just make sure you don't run past any enemies in this mission. Kill them all. There are many points you could just run through to the next objective, but you need to slow down and take everyone out for this one.