Place it just before the reveal in a gameplay edit, then follow it with FNAF Jumpscare Scream for the jump scare and use Enemy Spotted beforehand to signal danger is near for viewers.
About this sound
This 1.8-second clip is a brief, guttural zombie groan with a rough, inhuman edge, the kind of sound that makes a quiet game moment feel suddenly unsafe. It is tense and unsettling, with a raw menace that suits a surprise encounter, and it is presented as a new zombie sound from Halo Reach.