The archive is corrupted :(
I think it's a rar disguised as a zip.
Thank you so much @Johnny Law. I changed extension from zip to rar and it works now :-)
Grisly Grotto is one of my favorites from the campaign, looking forward to trying this one tonight.
Suoer Cool Map!
I love out of this world maps like this. Full Quake experience!
For me this ended up being not quite what I was hoping; it seemed short on ammo on skill 2, and also cramped/awkward to maneuver in several spots. Usually I can brush off one of those problems but both together are kind of a killjoy -- it's not fun to try to axe things to death unless you have room to work.
this is a really cool map with imaginative uses of space. however, it was way too difficult and seems downright impossible. i ended up using god mode msot of the time just because i wanted to see the rest of the map, and i'm glad i did.