Here is the full list of all 45 A Dragon's Tale: Fading Light achievements.
Enter the Forgotten Forest
Enter Death Canyon
Enter the Sanctuary
Enter the Frozen Desolation
Enter Hellfire Valley
Enter the Shadow Realm
Defeat Comodo
Defeat the Skull Crusher
Defeat the Dark Angel
Defeat the Leviathan
Defeat the Hydra
Defeat the Black Dragon
Collect your first rune
Unlock all ancient abilities
Unlock all fire abilities
Unlock all ice abilities
Unlock all plasma abilities
Unlock all poison abilities
Unlock all divine abilities
Upgrade all ancient abilities to level 9
Upgrade all fire abilities to level 9
Upgrade all ice abilities to level 9
Upgrade all plasma abilities to level 9
Upgrade all poison abilities to level 9
Upgrade all divine abilities to level 9
Upgrade all abilities to level 9
Collect all secrets in 5 levels
Collect all secrets in 15 levels
Collect all secrets in all levels
Collect 500 coins
Collect 1000 coins
Collect 1500 coins
Collect 20 stars
Collect 50 stars
Collect 100 stars
Defeat 250 enemies
Defeat 500 enemies
Defeat 750 enemies
Complete the game on the hardest difficulty
Complete the game on hero mode
Lure an enemy into water to kill it
Kill an enemy with a block of TNT
Find the hidden room in the temple of light
Defeat 10 enemies in a row without taking damage
Use light's vision to reveal all secrets in a level