Destroy at least one boss alien.
Earn at least one silver medal in any mission after The Awakening.
Survive all 99 waves on any Grinder challenge mode.
Earn a gold medal on at least 40 Story or Challenge mode missions in any campaign.
Earn a gold medal on the Campaign mode of Risk Exposure and Roundabout.
Earn a gold medal on the Campaign mode of Service Interruption and Height of Confusion.
Earn a gold medal on the Campaign mode of Urban Planning and Tactical Diversion.
Earn a gold medal on the Campaign mode of Kill Zone and Overflow.
Earn a gold medal on all the modes of Overflow.
Earn a bronze medal on all story missions in the You Monster campaign.
Fire the orbital laser.
Earn a gold medal on any story mission past 'Divided Attention' in the You Monster campaign.
Earn a gold medal on any 35 missions in the You Monster campaign.
Earn a gold medal on all story challenge missions in the You Monster campaign.
Earn a gold medal on all story missions in the You Monster campaign.
Build at least one of every tower type and available upgrade.
Earn at least one gold medal in any mission after The Awakening.
Win a mission with the last remaining core less than 10 seconds away from the map exit.
Complete the Story mode in The Awakening campaign.
Earn at least a silver medal on all Story mode missions in The Awakening campaign.
Destroy 1000 aliens.
Earn at least a gold medal on all Story mode missions in The Awakening campaign.
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