Here is the full list of all 37 The Mummy Demastered achievements.
Collect 100% of items
Discover of the 100% Map
Kill an Undead Agent
Die and be resurrected again by Ahmanet
Beat the game without dying
Escape to the chopper after defeating Ahmanet
Defeat Ahmanet
Collect the Plasma Beam
Collect the Cluster Rockets
Use a Phase Dash to destroy a wall
Perform a Dash Boost
Collect the Ankh of Seker
Collect the Scroll of Anuket
Defeat the Giant Scarab
Collect the Horus Bracer
Defeat Anubis
Collect the Ring of Wadjet
Collect the Flamethrower
Kill two enemies with one harpoon
Collect the Mercury Harpoon
Collect the Crown of Apis
Collect the C4
Collect the Scroll of Heket
Defeat Ammit
Collect the Incendiary Grenades
Collect the Scroll of Qebui
Use Rappel Gear
Collect the Rappel Gear
Collect the Shotgun
Collect the Scroll of Khepri
Defeat the Giant Arachnid
Collect a Bandoleer
Collect a Health Pack
Travel by Helicopter to a new location
Collect the Assault Rifle
Collect the Grenades
Escape the caves in Iraq