Here is the full list of all 12 Luxor 2 achievements worth 200 gamerscore. It takes around 150-200 hours to unlock all of the achievements on Xbox 360.
Match 12 or more spheres with a single shot.
Put together 5 chain reactions.
Complete a level without losing a life.
Complete Adventure Mode on the Easy difficulty level.
Collect 100 pieces of gems and jewelry.
Complete a level with 100% accuracy.
Collect 15 or more coins in a single level.
Complete Adventure Mode on the Normal difficulty.
Achieve a perfect rating on all bonus rounds.
Complete Adventure Mode on the Expert difficulty level.
Complete the Challenge of Horus.
Earn the play rank of Pharaoh of the Two Lands.