Beat Easy (2)
Win each of the easy levels
Beat Hard (15)
Beat 10 Hard levels
Beat Medium (10)
Beat 10 Medium levels
Blue Thunder (5)
Upgrade a Laser Tower to Level 7
Close Call (5)
Score a x50 Multiplier Bonus from any Creep
Easy Owned (10)
Beat every easy level without losing a life on any.
Easy Start (1)
Beat any of the easy levels
Flux Vortex (5)
Upgrade a Vortex Tower to Level 7
Green Machine (5)
Upgrade a Blaster Tower to level 7
Hard Owned (85)
Beat 10 Hard levels without losing a single life!
Hard Start (7)
Beat any hard level
Medium Owned (30)
Beat 10 Medium level without losing a single life!
Medium Start (5)
Win any of the medium levels
Red Menace (5)
Upgrade a Missile Tower to Level 7
Shocking And Awe (5)
Upgrade a Shock Tower to Level 7
Turret Happy (5)
Place one of each Turret on a level that supports all five Turrets