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!
Upgraded a Vortex Tower to Level 7
Placed one of each Turret on a level that supports all five Turrets
Owned all the Easy Levels, no lives lost!
All easy levels beaten
Upgraded a Shock Tower to Level 7
Upgraded a Missile Tower to Level 7
Upgraded a Laser Tower to Level 7
Beat first hard level
Upgraded a Blaster Tower to level 7
Scored a x50 Multiplier Bonus from a Creep
Beat first medium level
Beast first easy level