Complete each achievement to get the allotted gamerscore.

Unlockables

12 Gates of Luxor Temple (14) Match 12 or more spheres with a single shot.
5 Days of Thoth (15) Put together 5 chain reactions.

Challenge of Horus (19) Complete the Challenge of Horus.

Feather of Ma'at (15) Complete Adventure Mode on the Easy difficulty level.

Glory of Osiris (18) Achieve a perfect rating on all bonus rounds.
Golden Ankh Coin (16) Collect 15 or more coins in a single level.

Horns of Hathor (17) Complete Adventure Mode on the Normal difficulty.

Life! Health! Prosperity! (15) Complete a level without losing a life.

Magic of Isis (19) Complete Adventure Mode on the Expert difficulty level.

Pharaoh of the Two Lands (20) Earn the play rank of Pharaoh of the Two Lands.
Pharaoh's Treasury (16) Collect 100 pieces of gems and jewelry.

Royal Sharpshooter (16) Complete a level with 100% accuracy.