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