1. Alien Hallway Achievements
2. Master of defense achievement

Alien Hallway

248

20

2.65

373

133 (36%)

dfgarcia

248

20

17 Feb 20

17 Feb 20

5h 54m

Master of defense achievement in Alien Hallway

Master of defense

Upgrade the base till 5th level

0

17 February 2020 - 1 guide

How to unlock the Master of defense achievement

• Nomstuff67,689

  31 May 2014 25 Oct 2015
  0 0 0

  You need to upgrade the "turret Upgrade" to level 5, it takes roughly 100,000 credits to upgrade fully.

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