Here is the full list of all 18 BitMaster achievements.
Killed 32 768 mobs
Defeat the Dragon without using time crystals
Defeat the Vortex Defender at least once
Defeat the Stronghold boss at least once
Defeat the Dragon boss at least once
Killed 1 024 mobs
Survive till the third stage
Defeat the Twin boss at least once
Survive till the second stage
Defeat the Swarm boss at least once
:D
Killed 524 288 mobs
Survive till the fourth stage
Survive till the fifth stage
Unlock all the five heroes
Escape the Factor city and break the Fourth Wall
All heroes escaped the Factor city
Defeat the Vortex Defender without taking any damage