The Hall of Judgement is the place where barbarians of Antagarich go when they die. They stand before the Ancestors, a group of three great barbarians who weigh up the good and evil that the barbarian committed in life, and then judge whether they are worthy of entering Paradise or not.
The Hall of Judgement appears in Heroes Chronicles, where the main character Tarnum committed many atrocities as the barbarian king - including slaughtering innocent peasants because they wouldn't join his horde, and poisoning his own captains when they tried to get him to stop his mad conquest and go home. As the Ancestors sensed some great potential in him, they sent him back to life as an immortal. He was then forced to do their bidding, performing great acts of good before they would let him enter Paradise.