I've made a scary number of these variant maps, based off the Brutes one Kaal made ages ago, each with different monsters... some with different weapons. This, however, was the 1st time someone else took one of those edits and made an edit of their own.
Nelsona (who is scary WICKED smart) put monster-pathing on the map and set it up so they attack in waves. He limited the scope of where players/bots can go on the map, instead of the full area there's a barrier between the base and the 1st of the mounds. Anyone who hits it gets bounced straight up and then back to the base; naturally it doesn't effect the incoming monsters.
After his edit was completed, I finalized a few things... and here we all are.
Usual Suspects:
==============
.u /system
.umx /music
.unr /maps
.png - pwetty
.txt - this message will self-destruct
Enjoy!
http://www.mediafire.com/download/1h7sr96s35kg8wl/MH-DefendingLand.zip