NOTE: Descriptions in this game are not accurate on both the site and Xbox Achievement tracker.
This achievement unlocks for the following conditions:
- Complete Level 07 on Insane
- Have all 4 medals for the Insane difficulty
To unlock Insane mode, you need to complete the level on both Normal and Hard with 4 medals. When going for the medals, keep in mind that you don't need to get all 4 in the same run. You only need to get all 4 eventually. The medals you need are:
- Kill 100% of the enemies (also contains kill 70%)
- Rescue 100% civilians
- Don't get hit
Some of these conditions will cause you to play in contradictory manners. For example, killing all enemies might make rescuing all civilians more difficult. Therefore, only worry about getting one medal set at a time. You can take 3 different runs to get those medals and still be okay for the achievement or unlocking the higher difficulty.