Siege Breaker

Survive 100 waves on Grinder challenge mode on any mission.

The Not-So-Friendly Skies

Build 100 Missile towers.

Master Siege Breaker

Survive 100 waves on any Super Grinder challenge mode.

Full House

Build and fully upgrade each tower type in one mission.

Tower Expert

Build every tower and every upgrade for each tower.

Full Potential

Win a chapter 4 (or later) mission with level 3 towers only and no selling.

Alien Tears

Earn a gold medal on every mission in Story mode.

Planet Defender

Earn a silver medal (or better) on all missions in the Story mode.

Base Defender

Complete the single player campaign in Story Mode.

The Path Most Traveled

Win a Gold medal on Mission 19 without using the Command Shuttle.

Pew Pew

Build 100 Laser towers.

Burn Baby Burn

Build 100 Inferno towers.

Untouchable

Beat a Chapter 4 mission or higher with zero cores captured.

Filthy Rich

Win a mission with at least 10,000 resources remaining.

Annihilator

Kill 10,000 aliens.

Diversity

Build at least 1 of each tower type in any single mission.

What IS that?

Inspect 10 aliens.

Kaboom!

Build 100 Cannon towers.

Would you like a boost with that?

Build 100 Boost towers.

Leadhead

Build 100 Gun towers.

Full Defense

Build 50 towers of any type in one mission.

Salvage Rights

Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)

Penny Pincher

Win a mission with at least 5,000 resources remaining.

Pumped Up Towers

Use the Tower Overcharge Special Weapon (Advisor Zacara).

Indecisive

Sell 10 towers or more in a single mission.

Liquidator

Sell 10 towers.

Boot Camp

Finish all the missions in Chapter 1 in Story Mode.

Now With Sprinkles

Enable a Tower Augmentation item on any tower.

Arsenal

Build 20 towers of any type in one mission.

Thanks for Playing!

Earn a Bronze (or better) medal in a Single Player Mission.

Field Promotion

Earn a silver (or better) medal.

Exterminator

Kill 1000 aliens.

Flawless Victory

Earn a Gold Medal.

Retry

Use the Reload Checkpoint option.

Eradicator

Kill 100 aliens.

If At First You Don't Succeed, Retry Again

Use the reload checkpoint option five times in a single mission.

Death From Above

Use the Orbital Laser Special Weapon (General Cai).

Hey! That's mine!

Kill an alien carrying a power core.

First Blood

Kill 1 alien.

No Sale

Win any mission without selling any towers.

Yellow Beats Green

Upgrade a level 1 tower to a level 2 tower.

Close Call

Save a core that is less than 10 seconds away from the map's exit point.

Happy Returns

Recover a loose core.

Surplus

Win a mission with at least 1,000 resources remaining.