Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Army Of One	Reached Level 10.
Finished first mission	Reached Wave 8 On The Rescue Mission.
Finished second mission	Reached Wave 8 On The Survivors Mission.
Finished Tutorial	Finished the tutorial.
High Accuracy	Finished Wave 4 With More Than 80% Accuracy.
Protector	Friendly Reached Max Level.
Slayer	Killed more than 100 enemies in a single game.
Stargazer	Hang in the mission control center for 5 minutes.
Unlocked the Dual Gunner	Unlocked the Dual Gunner.
Unlocked the Engineer	Unlocked the Engineer.
You are no the boss of me	Killed a boss.