Here is the full list of all 22 InfiniPicross achievements.
100 Solved
50 Solved
25 Solved
A Certain Familiarity
Change Theme
Create a Theme
Use The Workshop
10 Continues in a Row
10 Solved
5 Continues in a Row
5 Solved
One Continue
Reset a Filled Grid
First Solve
3x3 or Bigger Completed
5x5 or Bigger Completed
10x10 or Bigger Completed
15x15 or Bigger Completed
25x25 or Bigger Completed
50x50 or Bigger Completed
99x50 (or 50x99) or Bigger Completed
Set a Seed