Fully upgrade all weapons.
Complete the first level.
Complete uncharted area 3.
Complete uncharted area 5.
Complete uncharted area 1.
Defeat the Abyss Lord.
Complete uncharted area 6.
Complete a level without using any turrets.
Complete a level without taking any damage.
Complete uncharted area 4.
Defeat the Lava King.
Complete a level with very low health.
In a level, get killed by the last remaining enemy.
Defeat the Stone Guardian.
Collect 100 relics.
Complete a level without firing a single shot.
Play a level where there are more than 50 enemies at the same time.
Defeat the Elder Guardian.
Fully upgrade all turrets.
Complete uncharted area 2.