Frenzy of the Damned
Download from mythaddict.atvcowboy.com
Download from Project Magma
Frenzy of the Damned was a co-op made for TFL by Conner of Clan Plaid. Set on the mudpit map, it threw wave after wave of impossible enemies at you, and if you survived that you were rewarded with a trow smackdown.
Although one person beat the plugin on Heroic, and solo at that, there were no recorded Legendary wins after many attempts.
Now the addictive insanity that is Frenzy is coming to Myth II, with a ton of enhancements.