Horn of the Abyss is a mod for Heroes of Might & Magic III (and also requiring the add-on Shadow of Death) crated by Kwasowa Grota. Itís designed as an unofficial expansion pack providing new units, artifacts or towns with minimal effect on game's mechanics. The best thing about this project though is a set two new singleplayer campaigns, both huge, very polished and with excellent stories.
How to install:
Extract the archive into gameís folder.
Report problems with download to firstname.lastname@example.org