Most critics like When Evil Lurks: nine of the twelve reviews are positive and none is negative. The praise clusters on Rugna’s mythology, a possession outbreak whose rules are revealed gradually rather than explained, and whose shocks grow out of the characters and the rural Argentine setting rather than arriving on cue. Several reviews also single out the craft, in particular the widescreen photography, the score and the practical effects, and most agree the violence is brutal, unflinching and staged with real skill.
The reservations gather in the second half. The Los Angeles Times finds the climax rushed, Paste finds some third-act choices too mystifying, and Collider thinks the setup is laboured. The spread is fairly wide. Polygon sits at the top, treating the film as a memorable revival of possession horror, while IndieWire is the only dissenter of note, finding it mediocre and saying it squanders a promising opening by losing momentum.
