Before I started a 3D engine project and named it 'Irrlicht', I was working on a small hobby project game, but didn't finish it, unfortunately. The name of that game was planned to be 'Irrlicht', but later, because I had canceled the game and needed a name for my new 3D engine project, I simply borrowed the name 'Irrlicht' from there. :)
The 'Irrlicht'-game was planned to be an isometric role playing game, and I was working on it in the last millennium, in the end of the year 1999. I even had a website for it and was updating it regularily, writing development news, something which people would today call 'a blog'. Just found the website on a very old backup CD:

The website was written in german and some parts of the site today appear quite funny and naive to me. But this was the first time I used the name 'Irrlicht' for one of my projects. The mp3 music file I am talking about on that shot above still exists: It is the music which can be heard in the Demo example of the
Irrlicht 3D engine.
you know who.