Here is the full list of all 10 BlitzPunch achievements.
Survive 5 minutes in the BlitzPunch Challenge
Discover the third Enemy Unit
Survive 1 minute in the BlitzPunch Challenge
Discover your first Enemy Unit
Discover the second Enemy Unit
Dare to enter the BlitzPunch Challenge
Survive 10 minutes in the BlitzPunch Challenge
Discover the fourth Enemy Unit
Discover the fifth Enemy Unit
Discover the sixth Enemy Unit