Destroy at least one boss alien.
Earn at least one silver medal.
Earn at least one gold medal.
Destroy 1000 aliens.
Save a core less than 10 seconds away from the map exit.
Recover a loose core.
No towers sold in a single mission.
Kill an alien carrying a power core.
Kill 1 alien.
Kill 100 aliens.
Win with 1,000 resources remaining.
Win with 5,000 resources remaining.
Win with 10,000 resources remaining.
Sell 5 towers.
Activate reconnaissance system.
Build 5 Gun towers.
Build 5 Inferno towers.
Build 5 Laser towers.
Build 5 Temporal towers.
Build 5 Meteor towers.
Build 5 Tesla towers.
Build 5 Cannon towers.
Upgrade a tower.
Inspect 10 aliens.
Use speed up controls for a total of 30 seconds in any one mission.
Shoot down a flying alien.
Finish the first 3 missions.
Build 20 towers in one mission.
Build 50 towers in one mission.
Fire the orbital laser.
Survive 100 waves on the Grinder challenge mode.
Complete the Story mode.
Earn a silver medal on all missions in the Story mode.
Earn a gold medal on any 100 missions in The Awakening campaign.
Build every tower and upgrade.
Earn a gold medal on all missions in the Story mode.
Win mission with the last core less than 10 seconds away from the map exit.
Sell 10 towers in a single mission.
Beat an advanced mission with zero cores captured.
Witness 1 core handed off 10 times within 20 seconds.
Gain 10000 resources from interest in a single mission.
Build 6 towers within 10 seconds.
Alien time until exit exceeds 5 minutes.
Build all tower types in one mission.
Build all upgrades of all tower types in one mission.
Kill 10,000 aliens.
Kill 50,000 aliens.
Build 5 Missile towers.
Build 5 Command towers.
Build 5 Concussion towers.
Beat an advanced mission with only Gun towers.
Beat an advanced mission with only Inferno towers.
Beat an advanced mission with only Cannon towers.
Beat an advanced mission with only level 1 towers.
Beat an advanced mission with only level 3 towers and no selling.
Reload an earlier save checkpoint.
Shoot down flying alien carrying a core.
Earn a gold medal on the Campaign mode of Service Interruption and Height of Confusion.
Earn a gold medal on the Campaign mode of Risk Exposure and Roundabout.
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 gold medal on the Story and Story Challenge modes of Ghost in the Machine and Divided Attention.
Earn at least a silver medal on the Story or Story Challenge mode of Divided Attention.
Beat all 5 "Out of Bullets" challenge modes without using Gun or Cannon towers.
Earn a bronze medal on all story missions in the You Monster campaign.
Earn a gold medal on any 35 missions in the You Monster campaign.
Earn a gold medal on any story mission past 'Divided Attention' 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.
Earn a silver medal on all story missions in the You Monster campaign.
Earn a gold medal on 10 challenge modes in the You Monster campaign.
Earn a gold medal on any 150 missions in The Awakening campaign.
Earn a gold medal on an adrenaline challenge mode.
Earn at least a Bronze medal on the Story or Story Challenge mode of Foothold building ten towers or less without selling.
Reload an earlier save checkpoint five times in a single mission.
Survive 100 waves on any Super Grinder challenge mode.
Begin playing any mode of the Containment Campaign.
Earn a Gold medal on any Containment mission without going back to a save checkpoint.
Earn at least a Bronze medal on all eight Story modes in the Containment campaign.
Earn a Gold medal on all eight Story modes in the Containment campaign.
Earn at least a Bronze medal on all 40 modes in the Containment campaign.
Earn a Gold medal on all 40 modes in the Containment campaign.
Earn at least a Bronze medal on the Story or Story Challenge mode of Occupation using only Gun, Inferno, and Laser towers.
Prevent the aliens from stealing a core until they have arrived safely at the second core housing in the Story or Story Challenge mode of Auger.
Earn a Gold medal on the Story or Story Challenge mode of Volition building fifteen towers or less without selling.
Earn a Gold medal in the Campaign Reversed mode of Passage without building any Meteor or Missile towers or using the Orbital Laser.
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