Here is the full list of all 20 Bullet Candy achievements.
From The Start, Complete Level 20 Without Dying. You Can Use Suicide
Score 1,800,000 By The End Of Level 11 In Arcade Mode In Normal Difficulty
Complete The First 3 Levels Of Arcade Without Firing A Single Bullet
Unlock Survival Mode
From The Start, Complete Level 10 Without Dying. You Can Use Suicide
Finish Arcade Mode In Normal Difficulty
Finish Extend Mode
Unlock Turbo Mode
Collect 800 Or More Golden Ships And Clear Arcade Mode
Clear Your 100th Game In Arcade Mode
From The Start, Complete Level 30 Without Dying. You Can Use Suicide
From The Start, Complete Level 40 Without Dying. You Can Use Suicide
From The Start, Complete Arcade Mode Without Dying. You Can Use Suicide
Clear Arcade Mode Without Loosing A Life Or Committing Suicide
Score Over 100,000,000 Points In Arcade Mode In Normal Difficulty And Finish The Game
Score Over 2000,000,000 Points In Arcade Mode In Insane Difficulty And Finish The Game
Clear Arcade Mode With 40 Or More Lives Remaining
Commit Suicide And Save The 10x Multiplier And Triple Shots
Clear Arcade Mode Without Getting The Laser Shots
Clear Arcade Mode In Under 11 Minutes 30 Seconds