Secure the Keys

Secure the Keys
Secure the keys is a easter egg in the map Salvation Base by TheDoctor115.

How to get the easter egg
After surviving 20 rounds, a small card will appear on a table in the lab. Holding the action button [X on XBOX 360]

causes the card to appear in your inventory. Insert this card in a slot in a small console in the security room [the one with the small blinking orange light] and a key will appear in your inventory.

Go to the jet outside and hold the action button by the jet to complete the easter egg.

After completing the easter egg, the Perk-a-Punch will activate [unless it already has], you will recieve a random perk, and a Death Machine.