Man I love old school techo/rave. I can’t say I have heard anything Belgian - that I am aware of. Most of what I was into came from the UK and Chicago. I think though I can hear some influence of what will lead to Aggrotech like Grendel (based in Belgium’s neighbor, Netherlands.)
What I have in my collection that most matches this is Zero Zero - World Famous Killer - not quite as dark or fast. I wish I had more info on these small artists who only put out a few EPs. Zero Zero was really good from the 2-3 songs I’ve heard.