Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Builder	Build 1,000 towers.	100
Faithful payment	Complete all levels with 3 stars.	100
Furious	Manually send 100 waves of enemies.	50
General	Kill 1,000 enemies.	50
Head Hunter	Earn 100,000 coins.	100
In the balance	Finish the level with 1 hp.	100
Innovator	Fully upgrade 200 towers.	100
Meat-grinder	Kill 50,000 enemies.	100
Merlin	Kill 500 enemies with spells.	100
Seller	Sell 30 towers.	50
Tycoon	Sell 500 towers.	100
Worker	Build 50 towers.	50