Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Architect	Build 1000 towers.	100
Armorer	Make a complete improvement for 50 towers on the levels.	100
Battle Mage	[Invisible Threat]: Use the spell 200 times.	100
Builder	Build 50 towers.	100
Direct hit	[Invisible Threat]: Kill five enemies with one shot.	100
Enemy at the Gates	[Invisible Threat]: Kill 1500 enemies.	100
Engineer	Fully upgrade any tower in the store.	100
Gunner	Kill 1000 enemies.	100
Magician	Kill 500 enemies with spells.	100
Merchant	Sell 500 towers.	100
Miner	Build 50 mines.	100
Ruthless	Kill three enemies with one spell.	100
Tactician	[Invisible Threat]: Complete all levels to three stars.	100
Trader	Sell 50 towers.	100
Warrior	[Invisible Threat]: Pass level without spells.	100