Alien Tears |
Earn a gold medal on all missions in the Story mode. |
Annihilator |
Kill 10,000 aliens. |
Arsenal |
Build 20 towers in one mission. |
Base Defender |
Complete the Story mode. |
Boot Camp |
Finish the first 3 missions. |
Burn Baby Burn |
Build 5 Inferno towers. |
Close Call |
Save a core less than 10 seconds away from the map exit. |
Confident |
Use speed up controls for a total of 30 seconds in any one mission. |
Death From Above |
Fire the orbital laser. |
Diversity |
Build all tower types in one mission. |
Eradicator |
Kill 100 aliens. |
Exterminator |
Destroy 1000 aliens. |
Field Promotion |
Earn at least one silver medal. |
Filthy Rich |
Win with 10,000 resources remaining. |
Firebug |
Beat an advanced mission with only Inferno towers. |
First Blood |
Kill 1 alien. |
Flawless Victory |
Earn at least one gold medal. |
Full Defense |
Build 50 towers in one mission. |
Full House |
Build all upgrades of all tower types in one mission. |
Full Potential |
Beat an advanced mission with only level 3 towers and no selling. |
Great Ball of Fire |
Build 5 Meteor towers. |
Gun Crazy |
Beat an advanced mission with only Gun towers. |
Happy Returns |
Recover a loose core. |
Head Trauma |
Build 5 Concussion towers. |
Hey! That's mine! |
Kill an alien carrying a power core. |
High Voltage |
Build 5 Tesla towers. |
I Spy |
Activate reconnaissance system. |
Indecisive |
Sell 10 towers in a single mission. |
Kaboom! |
Build 5 Cannon towers. |
Leadhead |
Build 5 Gun towers. |
Liquidator |
Sell 5 towers. |
Master Strategist |
Earn a gold medal on all Challenge modes. |
Minimalist |
Beat an advanced mission with only level 1 towers. |
Nail Biter |
Win mission with the last core less than 10 seconds away from the map exit. |
No Sale |
No towers sold in a single mission. |
Not So Fast |
Build 5 Temporal towers. |
Overseer |
Build 5 Command towers. |
Penny Pincher |
Win with 5,000 resources remaining. |
Pew Pew |
Build 5 Laser towers. |
Planet Defender |
Earn a silver medal on all missions in the Story mode. |
Power Builder |
Build 6 towers within 10 seconds. |
Pyrrhic Victory |
Shoot down flying alien carrying a core. |
Relay Race |
Witness 1 core handed off 10 times within 20 seconds. |
Retry |
Reload an earlier save checkpoint. |
Salvage Rights |
Destroy at least one boss alien. |
Sharpshooter |
Shoot down a flying alien. |
Shell-shocked |
Beat an advanced mission with only Cannon towers. |
Siege Breaker |
Survive 100 waves on the Grinder challenge mode. |
Surplus |
Win with 1,000 resources remaining. |
The Long Road |
Alien time until exit exceeds 5 minutes. |
The Not-So-Friendly Skies |
Build 5 Missile towers. |
Tower Expert |
Build every tower and upgrade. |
Untouchable |
Beat an advanced mission with zero cores captured. |
Well Invested |
Gain 10000 resources from interest in a single mission. |
What IS that? |
Inspect 10 aliens. |
Xenocide |
Kill 50,000 aliens. |
Yellow Beats Green |
Upgrade a tower. |