| It's My Island|
Reach the boss wave using Flag of Power in the Backyard Battleground.
Difficulty: Somewhat hard
- For more strategies, see Flag of Power.
Reaching the boss wave in the Flag of Power mode may sound difficult, but because your character becomes a lot stronger in this game mode, you actually can do that by yourself. Remember to break the reinforcement crates and you will have more AI teammates to help you progress further. If you want to do this achievement fast, you can also invite some friends in order to make it easier.