Achievements...
	Cheat Mode...
	Gamer Pic...

Complete the following achievements to unlock Xbox Live Gamerscore points.

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

Click and hold the Right Analog-stick then enter one of the following codes on the D-pad to activate the corresponding cheat function. Repeat a code to disable its effect.

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

Start the game and go to the main menu to unlock the Defense Grid Gamer Pic.