Here is the full list of all 44 Immortal Redneck achievements.
Beat the game with 20 lives or less
Kill 50,000 minions
Buy every level of each Skill Tree node
Beat the game with the Cursed Medallion
Beat the game with the Plague Medallion
Beat the game using all the favors of the Gods
Unlock and buy every medallion
Defeat Fayoum
Beat the game
Defeat Asyut
Get more than 50,000 coins in a game
Equip all the weapons
Buy every Skill Tree node
Die 50 times
Defeat Temsep
Acquire four jumps in a game
Complete a pyramid without taking scrolls or weapons
Defeat Maaty
Pay 5,000 coins or more as a tribute
Find every scroll
Spend 100,000 coins on the Skill Tree
Obtain Thoth's Favor
Obtain Ammit's Favor
Obtain Hathor's Favor
Find the Crowbar, the Rocket Launcher and the Explosive Bow
Complete a pyramid exploring all of its rooms
Kill 7 enemies with a single explosion
Obtain Neith's Favor
Obtain Amunet's Favor
Defeat Weryt
Get 10 scrolls in a game
Defeat Pharaoh
Defeat Pharaoh in under 15 minutes from when you enter the pyramid
Kill a chicken
Obtain Sekhmet's Favor
Obtain Apis' Favor
Find your first blueprint
Nice try but sorry, you're trapped in here
Use Déjà Vu to keep the layout of a pyramid
The Merchant is open for business
Get a health steak from a vessel
Complete a Skill Room
Obtain Seth's Favor
Reach the second floor of the pyramid