Anger Management

The endless bodies of these creatures began creating a small hill underwater, where more and more beasts sacrificed their bodies to make it grow bigger.

With that, after some point in time, the moat was filled enough for the beasts to walk on top of their brethren's bodies.

Just as they sat foot on the other side of the moat, the turret above the fortress began rotating. Lead rained down killing any beast that didn't move too fast.

While other cannons aimed at the pile of corpses blowing them up and relieving the pressure, destroying the bridge made of corpses that soon was filled.

Faster creatures managed to bypass all the dangers from the exit of the portal, across the turrets that hadn't stopped firing their abilities, and even past the middle minigun turret, through the long row of manned cannon lines, and even across the poison field dodging every landmine in sight. They jumped over the corpse bridge and dodged the minigun.