This is a new unofficial level editor for the Sierra Lode Runner games. It runs on Windows 95/98/NT (though the puzzles created by it should work anywhere).
You can use Hacker's Editor it to do some things that are impossible to do with the regular editor. It is best to initially create puzzles using the regular editor, and then load them into Hacker's Editor to make the modifications you want.
This editor was written by Jim Winkler. Feedback should be directed to him (firstname.lastname@example.org).