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