What have you done?

[P U S S Y C A T 🐱]

So i have renamed a area and then the game crash but still no achiviement :/

[Speedy]

http://fastcall22.blogspot.nl/2010/03/eversion-level-editor-13-eversionmod-10.html

You'll want to use that level editor. Just edit one of the official maps with like the addition of a single block or something, and you'll get the achievement when you boot the game.

It's a fairly interesting achievement since it requires something not made by the official developer. :P

[Theero]

Idt you need to use the level editor, just take out one of the area files. That worked for me