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