Complete each achievement to get the gamerscore.

Achievement	How to unlock
Arsenal ( 10 points )	Upgrade all units to level 3 in a single online match
Atlantis Rising ( 10 points )	Complete the Atlantis Rising campaign
Deep 6 ( 20 points )	Get 200 depth charge kills
Dive Master ( 10 points )	Get 100 kills
Frenzy ( 30 points )	Complete each chapter on the Ultra difficulty setting
Humanity's Hope ( 10 points )	Complete the Hope of Humanity campaign
Hydropwnage ( 20 points )	Win an online Conquest match by taking all of the control points ( get a shutout points )
Life Aquatic ( 15 points )	Upgrade all units, all races to level 3
Lord of the Deep ( 35 points )	Get 10,000 kills
Navy of One ( 10 points )	Take over 100 control points
Nemo's Wrath ( 10 points )	Complete the Nemo's Wrath campaign
Swim Pals ( 20 points )	Complete each chapter in co-op mode