Full list of all 16 geoDefense achievements worth 200 gamerscore. It takes around 3-4 hours to unlock all of the achievements on Windows Phone.
10 Hard Levels beaten, not a single life lost!
10 Hard Levels beaten
10 Medium Levels beaten
Beat 10 Medium Levels, no lives lost!
Beat first hard level
Owned all the Easy Levels, no lives lost!
Upgraded a Vortex Tower to Level 7
Placed one of each Turret on a level that supports all five Turrets
Beat first medium level
All easy levels beaten
Upgraded a Missile Tower to Level 7
Upgraded a Blaster Tower to level 7
Upgraded a Shock Tower to Level 7
Scored a x50 Multiplier Bonus from a Creep
Upgraded a Laser Tower to Level 7
Beast first easy level