Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Explorer ( 15 points )	Discover an optional battle map.
Revelations ( 15 points )	Finish Act I.
Royal Defender ( 15 points )	Finish Act III.
Sandworm Slayer ( 15 points )	Finish Act II.
Tag Team ( 10 points )	Execute a Team Attack.
Treasure Hunter ( 10 points )	Find a hidden item on any battlefield.
Wanderlust ( 25 points )	Discover every battle map.
Weapon Mastery ( 25 points )	Raise a weapon skill to rank 25.
Zero Casualties ( 15 points )	Win a battle with 6 surviving party members.