Here is the full list of all 18 Pyramid Raid achievements.
Start the game for the first time
Click the Corporate Homepage button in the Title Screen or the Options Screen
Change an option in the Options Menu
Watch the Credits for at least 60 seconds
Complete the Tutorial
Switch the gender of your mummy
Own one Mummy Accessoire
Own three different Mummy Accessoires
Own one Mummy Skin
Die 100 times
Die 1000 times
Die 10000 times
Play the game for a total of 10 hours
Completely clear out a burial chamber
Chapter one completed
Chapter two completed
Chapter three completed
Chapter four completed