Here is the full list of all 12 Throne Together achievements worth 200 gamerscore.
Get 10 Stars across all levels
Get 100 Stars across all levels
Get 195 Stars across all levels
Beat a timed level with more than 30 seconds left on the clock
Turn 25 gargoyles into fountains
Build 50 blueprints
Simultaneously juggle 7 blocks in play at the same time
Complete a level with at least 20 enclosed spaces
Light up 30 torches
Receive an extra life from 5 friends
Repair 100 cracked blocks with cement
Complete a level with at least 30 cracked blocks