Unlike with other races orcs do not have a paradise they go to upon death. No fluffy clouds. No harp playing cherubs. No endless rolling meadows.
Instead they go to Gol Gor Lu.
And through this vast hellish landscape they must fight their way. Past the fiery lakes they must tread. Past the fetid maggot pits where the cowards are condemned to for eternity. Must endure the constant gnawing hunger as nothing is edible. And they must battle their way past nightmarish demons each stronger and more horrific than the last.
All to reach the great gate.
And if they can manage to get there and go through it they are rewarded by being reborn to a new mortal life.