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