Here is the full list of all 38 Meliora achievements.
Unlock your first B rank character
Unlock your first A rank character
Unlock your first S rank character
Unlock your first SS rank character
Unlock all the B rank characters
Unlock all the A rank characters
Unlock all the S rank characters
Unlock all the SS rank characters
Collect 5000 coins
Collect 10000 coins
Collect 50000 coins
Collect 100000 coins
Dismantle 100 fragment
Dismantle 500 fragment
Craft 50 fragment
Craft 200 fragment
Play 10 survival games
Play 50 survival games
Play 100 survival games
Play 10 Adventure games
Play 50 Adventure games
Play 100 Adventure game
Play 10 Arcade games
Play 50 Arcade games
Play 100 Arcade games
Collect 10 free hourly Summoning tickets
Collect 50 free hourly Summoning tickets
Collect 100 free hourly Summoning tickets
make 50 Summoning wishes
make 100 Summoning wishes
make 200 Summoning wishes
Save 100 saved slots
Save 500 saved slots
Save 1000 saved slots
Land on reaper 20 time
Refill your active skill 50 time
Use devil’s coins 10 times
Watch the game tutorial