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Achievements
Area 51 DefenseSync your progress to see which achievements you've unlocked.
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2 x 2 x Combo
Get 2 x Kill Combo two times.
72.1% global
5 x 5 Kill Streak
Get 5 x Killstreak five times.
59.8% global
200 Kills
Two hundred targets destroyed.
51.6% global
2000 Kills
Two thousand enemies eliminated.
19.6% global
20 000 Kills
Twenty thousand foes removed.
10.6% global
200 000 Kills
Two hundred thousand adversaries decimated.
10.6% global
2 000 000 Kills
Two million invaders liquified.
10.6% global
Airstrike Withheld
Survive through ten waves without a single airstrike.
10.6% global
Health Pickups Withheld
Survive through five waves without health power-ups.
11.4% global
