It's a Zendrum. www.zendrum.com
In the scenario description (pg 31 of the original rulebook), it says that the heroes must leave through a specific exit--however, there is no "Heroes' Exit" on the map.
There is, though, a "Villains' Entrance", even though all ten orcs are begin the scenario on the map.
Is the "Villains' Entrance" supposed to be the "Heroes' Exit"?
I didn't design those scenarios, so I'm not sure at all. I'll see if I can find out.