Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Admiralty Almanac ( 10 points )	Unlock all player ships in the game.
Battle Bravery Badge ( 10 points )	Defeat the Prize Cruiser.
Chaser ( 10 points )	Win 10 Chase mode games.
Collector of Collectibles ( 30 points )	Collect all Collectibles in the game.
Divine ( 20 points )	Finish an episode without dying on Extreme.
Emperean Navy Medal of Honor ( 30 points )	Defeat the Biotica Ultima.
Gadget Finder ( 10 points )	Find the hidden upgrade in the Prologue mission.
Legend ( 20 points )	Kill 2500 enemies.
Naval Academy Award ( 10 points )	Finish the Tutorial.
Navy Shield of Merit ( 20 points )	Defeat the Biotica Serpenta.
Shellshock ( 10 points )	Destroy a Behemoth artillery ship.
Wavebreaker ( 20 points )	Survive 25 waves in Skirmish mode.