- Achievements
Do the following things to obtain the corresponding Gamerscore points:

5 Points
Salvage Rights	Destroy at least one boss alien.
10 Points
Tower Expert	Build at least one of every tower type and available upgrade.
Death From Above	Fire the orbital laser.
Field Promotion	Gain at least one silver medal in any mission after The Awakening.
15 Points
Nail Biter	Be victorious in a mission with the last remaining core less than 10 seconds away from the map exit.
Flawless Victory	Gain at least one gold medal in any mission after The Awakening.
20 Points
Base Defender	Finish the Story mode in The Awakening campaign.
Planet Defender	Gain at least a silver medal on all Story mode missions in The Awakening campaign.
Exterminator	Destroy 1000 aliens.
Alien Tears	Gain at least a gold medal on all Story mode missions in The Awakening campaign.
25 Points
Siege Breaker	Survive all 99 waves on any Grinder challenge mode.
30 Points
Master Strategist	Gain a gold medal on at least 40 Story or Challenge mode missions in any campaign.

10 Points
Combat Turmoil	Gain a gold medal on the Campaign mode of Service Interruption and Height of Confusion.

10 Points
Circular Hazard	Gain a gold medal on the Campaign mode of Risk Exposure and Roundabout.

- Activate Cheats
While you are playing this game, click and keep pushed the Right Analog-stick, then enter one of the following codes on the D-pad to obtain the corresponding effect. Repeat a code to disable its effect. Notice: Enabling codes will disable the ability to earn medals and achievements. Also, enabling the '100,000 resources' code will record you as finishing with one core and getting a score of 2,000.




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Code
Effect
Level select	Up(2), Down(2), Left, Right, Left, Right
Kill all aliens	Left, Right, Left, Right
Aliens cannot grab cores	Up, Left, Down, Right
Cores cannot be taken	Up, Left, Down, Right
Kill all aliens carrying cores	Up, Down, Down, Up
Toggle target reticule	Down, Up, Down, Up
Unknown	Up, Right, Down, Left
Unknown	Left(2), Right(2)
All tower types	Up, Down, Left, Right
100,000 resources	Right(4)
Auto defeat	Down(4)
All towers and upgrades	Left, Up, Down, Right
Auto victory	Up(4)
Free camera mode [Note]	Down, Up, Down(2)