If You complete the indicated task You'll get the allotted gamerscore.
Powered Up - Capture a powerup while you are under the effect of an other powerup.
The Conqueror - Conquer at least 40% of the playfield with a single capture.
Triple X - Capture at least 3 triggers with one capture.
Zoo Master - Capture one of each enemies.
All birds with one stone - Destroy all towers (at least 2) on a level with a single capture.
Face off - Capture xitrof.
Flawless Victory - Complete every level to perfect on any difficulty.
Mission Impossible - Finish the game on Impossible difficulty.
One more - Capture a catapult trigger when there is no more turret left to shoot out.
Collector - Capture 100 powerups.
Dragon Crisis - Let Xitrof lay 15 eggs on the final level, then win the level.
Dragon Master - Capture 100 dragons.