How to use it

1. Go to achievements window
2. Select achievements tagged with "Hidden Mod Key"
   
3. Type down gem grades for each unlocked achievement in hexadecimal notation:
4. Paste them into Achievement codes field above, one code per line.

If it's possible to generate secret codes from these achievements, they will appear below.

Then it will be possible to type these secret code using buttons on bottom edge of the map.