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