Here is the full list of all 30 SwapQuest achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
King of the Slimes!
Collect 15.000 Jewels.
Finish every challenge level.
Find the hidden boss.
Master an armor.
Master an ability.
Master a weapon.
Find the hidden challenge level.
Defeat 200 Enemies.
Swap 2.500 Tiles.
Reach level 25.
Watch the credits.
Something's lurking in the dark.
Collect 5.000 Jewels.
Find all the hidden jewels.
Collect 999 Jewels in one level.
Defeat 100 enemies.
Swap 1.000 Tiles.
Use an active ability 50 times.
Reach your second class change.
Defeat Ulthros, the giant kraken!
Defeat 50 Enemies.
Collect 1.000 Jewels.
Use an active ability 10 times.
Swap 500 Tiles.
Beat Xerberus, the three-headed hound!
Use an active ability.
Reach your first class change.
Defeat Ghargon, the evil bug!
Defeat a midboss.