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