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