Here is the full list of all 18 Elems achievements.
You’ve activated 25 Gravity Elems
Level “Hell” is done
You’ve gone through 25 teleports
1000 diamonds are collected
You have restored 1000 units of energy
You managed to finish the level with only 1% of life energy
You’ve put out 25 Fire Elems
500 diamonds are collected
Your life energy is over
You died of the Fire Elem
You’ve burnt 25 Stone Elems
100 diamonds are collected
You died of the blow from above
Level “Ice” is done
Level “Jungle” is done
Level “Water” is done
All the levels of the game are done
The riddle level is done