Achievement Walkthrough...

Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Level 12	Complete Level 12.	100
Level 13	Complete Level 13.	200
Level 15	Complete Level 15.	100
Level 18	Complete Level 18.	100
Level 19	Complete Level 19.	200
Level 1	Complete Level 1.	200
Level 21	Complete Level 21.	100
Level 24	Complete Level 24.	100
Level 25	Complete Level 25.	200
Level 27	Complete Level 27.	100
Level 30	Complete Level 30.	100
Level 3	Complete Level 3.	100
Level 6	Complete Level 6.	100
Level 7	Complete Level 7.	200
Level 9	Complete Level 9.	100