Here is the full list of all 17 Giana Sisters: Twisted Dreams - there are Rise of the Owlverlord achievements.
Shut down the Airborne Factory's power core in level 4 on normal difficulty or higher.
Survive the ancient traps of level 2 on normal difficulty or higher.
Break Giana's cage in Level 1.
Find and collect all 1206 gems hidden in Level 6 on normal difficulty or higher.
Defeat the Owlverlord in level 7 on normal difficulty or higher.
Survive the ancient traps of level 2 on hard difficulty or higher.
Shut down the Airborne Factory's power core in level 4 on hard difficulty or higher.
Find and collect all 1206 gems hidden in Level 6 on hard difficulty or higher.
Defeat the Owlverlord in level 7 on hard difficulty or higher.
Survive the ancient traps of level 2 on hardcore difficulty or higher.
Shut down the Airborne Factory's power core in level 4 on hardcore difficulty or higher.
Find and collect all 1206 gems hidden in Level 6 on hardcore difficulty or higher.
Defeat the Owlverlord in level 7 on hardcore difficulty or higher.
Defeat the Owlverlord in level 7 on uberhardcore difficulty.
Obtain five stars in all Rise of the Owlverlord levels.
Beat the Time Attack best times in all Rise of the Owlvlerlord levels.
Beat the Score Attack high scores in all Rise of the Owlvlerlord levels.