Here is the full list of all 28 The Hex achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Wooed a Great Kraken.
Complete the original Super Weasel Kid without any help from Mr. Shrewd.
Learn all of Catarina's secrets in Super Weasel Kid.
Help Rebecha survive the first wave in Walk.
Receive 4 card readings from Catarina in Walk.
Crashed Secrets of Legendaria.
Deal at least 500 damage in a single strike in Secrets of Legendaria.
Perform a 360 No Scope with the sniper rifle.
Score a true KO on Alley Gator in Combat Arena X.
Free Vallamir.
Crack all the vending machines at The Six Pint.
Discovered the truth about Mr. Shrewd.
Activate a gated mod in Waste World.
Buy 10 upgrades from the Scrap Shop in Waste World.
Find Missing No. in Secrets of Legendaria.
Crashed Waste World.
Crashed Walk
Crashed Super Weasel Kid '09.
Crashed Combat Arena X.
Opened The Hex.
Completed ???'s memory.
Completed Lazarus' memory.
Completed Rust's memory.
Completed Chandrelle's memory.
Completed Bryce's memory.
Score a 1000 hit combo in Combat Arena X.
Crack a soda vending machine at The Six Pint.
Completed Super Weasel Kid's memory.