Here is the full list of all 12 Tower Bloxx Deluxe achievements worth 200 gamerscore.
Have the countdown clock go over a minute in Time Attack
Win 50 competitive multiplayer matches.
Reach a population of 200,000 in Build City Mode
Reach a tower height of 100 in Build City or Quick Game Mode
Reach a tower height of 300 in Quick Game
Reach a tower height of 600 in Quick Game
Make 1 perfect drop.
Make 10 perfect drops in a row.
Come up with your own name for the city in Build City mode
Reach the last milestone in Build City Mode
Overtake three of your friends in Quick Game's friend ladder.
Build a 183 block high tower in Co-op multiplayer