Here is the full list of all 25 The Cursed Oasis achievements.
Set foot in The Cursed Oasis.
Collect all ten rune keys to the oasis temple.
Open the temple doors.
Collect all ten water runes to open the waterfall gate.
Exit the sunset oasis.
Collect all ten flaming obelisks to open the shrine barrier.
Collect all five ancient shrine obelisks to open the skull barrier.
Exit the Sand Tunnels.
Collect all ten magic orbs to break the curse of the oasis.
Exit the Hell Caves.
Free all twenty-five cursed statues and send them home.
Survive the night in The Cursed Oasis.
Exit the oasis and complete the game.
Find all twenty-five magical flowers.
Find all fifteen pearls in the depths of the sea.
Exit the Oasis at the Edge of the World.
Discover the treasure hidden beneath the island.
Find all twenty-five Snowflakes.
Find all fifteen Fabled Ice Jewels.
Find all five Mystery Boxes at the Oasis of the Frozen North.
Exit the Oasis of the Frozen North.
Find the map to The Island of the Lost.
Instead of entering the oasis, head back out into the desert.
Keep buttoned up about the secret button.
Watch through the end credits.