That name sounds very familiar. It probably was the demo, because there was definitely only one area. My memories of it are all tied up with my memories of Lords of the Realm, so I think we probably got the demo for free with LotR.
Makes sense since both games were published by Sierra.
And yeah, it was indeed an amazing game, sadly barely anyone knows it and it also had a mediocre reception when it was released. I've beaten the whole single player campaign, beaten all cooperative missions with a friend (I think SP + Coop is like 200 missions in total) and we've also smashed in our faces a zillion times in deathmatch - it was like friggin' 2D Unreal! I tried installing it recently but sadly the old Sierra installers don't work on Windows 7. Will have to try some stuff to get it working. I'm SO hoping that we'll get a GOG release of the game eventually.
Though back in those days a score in the 70s could often be bad, as many magazines wouldn't go too low for fear of ticking off the game publishers.
Interesting. I grew up with the German magazine Amiga Joker (later followed by PC Joker) and IIRC most of their scores were pretty darn low, I remember barely a single game that got a 90+ score - maybe Battle Isle was among them. Also many true classics everyone remembers now got low ratings there. Yeah, German games journalism wasn't EVER good. <.<