Upgrade house to max.

Prestige once

Prestige twice

Prestige four times

Prestige three times

Prestige five times

Call in an airstrike

Call in 50 airstrikes

Call in 10 airstrikes

Call in 100 airstrikes

Kill 50 zombies

Kill 500 zombies

Kill 150 zombies

Kill 1000 zombies

Kill 2500 zombies

Kill 10000 zombies

Kill 5000 zombies

Reach level 5

Reach level 10

Reach level 20