Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Christopher Wren ( 30 points )	Reach a tower height of 300 in Quick Game mode.
Guglielmo & Pisano ( 10 points )	Build a 183 block high tower in Co-op multiplayer.
I have a better idea... ( 5 points )	Come up with your own name for the city in Build City mode.
Keeper of Time ( 10 points )	Have the countdown clock go over a minute in Time Attack mode.
Louis Sullivan ( 45 points )	Reach a tower height of 600 in Quick Game mode.
Metropolis Builder ( 30 points )	Reach a population of 200,000 in Build City mode.
Michelangelo ( 15 points )	Reach a tower height of 100 in Build City or Quick Game mode.
Precise Architect ( 5 points )	Make 1 perfect drop.
Relentless ( 10 points )	Win 50 competitive multiplayer matches.
See you later! ( 15 points )	Overtake three of your friends in Quick Game's friend ladder.
Superior Architect ( 10 points )	Make 10 perfect drops in a row.
Trumped! ( 15 points )	Reach the last milestone in Build City mode.