You destroyed a lot of bad guys with your special weapons and obtained multiple times the MegaBlast badge, but the "Bomb the Bass" achievement still doesn't pop up? With this method, you will directly modify a file of the game to get what you deserve. Here is how to proceed:

1. - On Windows: Go to Users\YOU\AppData\LocalLow\STUDIO EVIL\SyderArcadeV13
   - On Linux: Go to $HOME/.config/unity3d/STUDIO EVIL/SyderArcadeV13
   
2. Find the "StudioEvil_Default" file.
   
3. Be sure to make a copy of the original "StudioEvil_Default" file elsewhere on your computer.
   If you have any trouble with the game after modification, restore the original file in its place.
   
   
4. Open the "StudioEvil_Default" file with Notepad.
   
5. Change the "Bombs Hits" valor to 1000 ("Bombs Hits=1000").
   NOTE: There must be no space between "Bombs" and "Hits".
   
6. Save the file and close Notepad.
   
7. Launch the game and start any mission, the achievement should pop up.

In my case, I started "Unfinished Business" at Pure Difficulty and it worked.