Full list of all 16 geoDefense Swarm achievements worth 200 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Windows Phone.
9 Hard Levels beaten, not a single life lost
9 Hard Levels beaten
Placed one of each type of Turret on a Level
9 Medium Levels beaten
Beat 9 Medium Levels, no lives lost
Beat a Hard Level
Score a x50 Multiplier Bonus from a Creep
Beat a Medium Level
Upgrade a Vortex Tower to Level 7
9 Easy Levels beaten
Owned all Easy Levels, no lives lost
Upgraded a Shock Tower to Level 7
Upgraded a Missile Tower to Level 7
Upgraded a Laser Tower to Level 7
Upgrade a Blaster Tower to level 7
Beat an Easy Level