Please offer some advice.

Gentlemen, please help me find a map. It's a scenario, not a campaign. There are no opponents; you're alone on the map. Another important distinction is that you can't recruit troops on this map; everything is disabled in the towns, and there are no hidden stashes on the map; you can only progress with heroes. You start with one hero at level 1. The goal of the map is to destroy all the monsters on the map. A Dungeon is present. I can't seem to find this map; I played it many years ago and now I want to replay it. I'm not sure, but I think it was a built-in scenario on the disc, not a downloaded map, but I repeat, I'm not sure. If anyone remembers this map and knows the name or where to find it, I would be grateful in advance.