Complete Campaign mode on Normal Difficulty or higher (Singleplayer or Co-Op).
The difficulty achievements are stackable
I would recommend playing this game straight through on hard as there are only a few bits within the game that are any sort of a challenge. I played it through on hard first time through. Even for a beginner at flying games I found this easy.
This achievement will unlock when you have finished mission 20.
Rate this achievement
There are no comments for this achievement. Be the first to comment.
You need to register before being able to post comments.