Here is the full list of all 27 Critical Mass achievements.
Complete classic Mode On Normal Difficulty In Under 20 Minutes
Complete Classic Mode On Expert Difficulty In Under 20 Minutes
Average Action's Per Minute 80+ In Rush Mode
Complete Classic Mode On Expert Difficulty
Complete Classic Mode On Casual, Normal & Expert
Complete Classic Mode On Normal Difficulty Using Both Normal & Reversed Controls
Survive For 5 Minutes In Survival Mode
Complete Classic Mode On Normal Difficulty Or Higher Without Using Rotation
Use A Fusion Pulse Above 90% Critical Mass On Normal Difficulty Or Higher
Complete Classic Mode On Normal Difficulty Or Higher Without Using Timewarp & Fusion Pulse
Build A 16x Combo In Meditation Mode
Finish Meditation Mode With A Score Of Zero
Get An Epic Performance Rating In Any Game Mode
Complete Classic Mode On Normal Difficulty
Survive At 80% Critical Mass For 10 Seconds In Survival Mode
Spin The Mass 300 Times In 10 Seconds
5 Combos Within 10 Seconds In Rush Mode
Complete Classic Mode On Casual Difficulty
Create A 13x Combo In Any Game Mode
Beat Your Personal Best Score In Classic Mode
Reach Rank 1 In The Overall Leaderboard
Unlock All Achievements
Play For 100 Hours
Reach Rank 1 In Classic Mode On Normal Difficulty Or Higher
Reach Rank 1 In Rush Mode
Reach Rank 1 In Meditation Mode
Reach Rank 1 In Survival Mode