Here is the full list of all 20 Angry Birds Space (Windows) achievements worth 200 gamerscore.
Smash 500 000 blocks
Angry Birds Space played for 30 hours
5000 birds launched
50 000 blocks smashed
500 pigs freezed
5000 stone blocks smashed
Angry Birds Space played for 15 hours
5000 wooden blocks smashed
250 stars earned
1000 bubbles popped
5000 ice blocks smashed
6 pigs scared with one green bird
100 birds exited atmosphere
Angry Birds Space played for 5 hours
1000 pigs smashed
3 pig freezes with one ice bird
Pig popped with another pig
All credits name bubbles popped
Bird shot into a lagrangian point
100 pigs popped in the main menu