Skorne, after being destroyed in the Underworld, following his defeat in the Desecrated Temple, Garm absorbs his power and unleashes his undead hordes to assault Sumner's Tower. Operating the gears of war, these hordes have quickly churned out siege engines and dug in for a protracted war. Unlike most Realms, the Battlefield only consists of three areas. The heroes of the realms and Sumner liked to practice their battle strategies here until it was taken over by Skorne.
- Anklebiter: Bone Dog, Advanced Bone Dog
- Golem: Wooden Golem
- Grunt: Skeleton Warrior
- Advanced Grunt: Skeleton Knight
- General: Skeleton Colonel
- Somewhere in the Infernal Fortress, you'll find a basketball basket and if you fire at it, you'll hear an announcer's voice. This is likely an easter egg reference to some earlier NBA games published by Midway Games.