The movie builds tension as the soldiers, led by Kate and their commanding officer, struggle to survive both the ravagers and the mounting insurgent attacks.

In a climactic final battle, the survivors devise a plan to destroy the bunker and seal the creatures inside forever.

Kate leads the charge, and they manage to set off a massive explosion, collapsing the bunker and trapping the ravagers underground.

"[1] Noel Murray of the Los Angeles Times wrote "The Lair doesn’t finish as spectacularly as it starts, but that just means it’s a good genre picture and not a great one.

"[4] Simon Abrams of RogerEbert.com awarded the film two-and-a-half stars out of four, calling it "a good-enough horror/action hybrid", praising the action scenes and practical effects of the monsters but had a more mixed opinion on the acting and dialogue.