Here is the full list of all 36 Oddworld: Stranger's Wrath HD achievements.
Finish the game on Easy
Defeat the corrupt Sekto.
Take out the two Gloktigi.
Reach Sekto Springs.
Take out Gloktigi.
Enter the Dam Facility.
Take a boat from Bloody Bay and survive.
Defeat the Wolvark attackers in the Native Village
Take out D. Caste Raider
Take out Fatty McBoomBoom
Take out Elboze Freely
Take out Lefty Lugnutz
Take out Xplosives McGee
Find the Black Market.
Take out Packrat Palooka
Take out Meagly McGraw
Take out Jo Mama
Find the hidden Grubb Idol
Rescue Eugene Ius
Kill Farmer Beeks
Take out Boilz Booty
Leap the broken bridge!
Take out Looten Duke
Take out Filthy Hands Floyd
Complete the Tutorial
Bounty Blizterz Booty
Find the hidden entrance into the Wolvark Barracks
Bounty 250 Outlaws
Bounty 250 Outlaws alive.
Have 20,000 Moolah when you take the barge to Doc’s Mongo Retreat.
Find a hidden bottle of medicine.
Collect 25 orange crystals.
Collect 40 Moolah chests.
Destroy the 10 hidden barrels.
Finish the game on Normal
Finish the game on Hard