Here is the full list of all 21 Cyberdrome achievements.
Begin playing Cyberdrome
One of many deaths
Completed Zen
Completed Dumpling Street
Completed Acid
Get 1,000,000 points on Zen
Get 1,500,000 points on Dumpling Street
Get 450,000 points on Acid
Complete Zen in under 360 seconds
Complete Dumpling Street in under 420 seconds
Complete Acid in under 270 seconds
Complete Zen without dying
Complete Dumpling Street without dying
Complete Acid without dying
Get 150 aerial kills in one match
Get 80 deflection kills in one match
Get 100 focus kills in one match
Kill 7 enemies in a single attack
Lose 3 lives in a single match
Look at the credits
Complete a level without using focus mode