Here is the full list of all 12 Throne Together achievements worth 200 gamerscore.
Completed a level with at least 20 enclosed spaces
Got 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
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