Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Chimp on the Barbie ( 35 points )	In Ascension, kill a space monkey with a fire trap.
Space Race ( 45 points )	In Ascension, Pack-a-Punch a weapon before round 8.
The Eagle has Landers ( 35 points )	In Ascension, escape on all three lunar landers.
They are going THROUGH! ( 35 points )	In Ascension, kill at least 5 zombies with 1 Gersch device.