FNAF Doomsday is a fan-made horror game built around the Five Nights at Freddy's formula, placing the player alone in an office during a night shift while animatronic threats move unseen. The office clock sound is part of that setting, marking time in the background as players monitor cameras and manage limited resources. Because the original games made office ambience central to their tension, fans recognised the ticking immediately and began sharing it on soundboards for edits, streams and gameplay videos. It remains useful because it instantly signals a FNAF-style night shift without needing a jumpscare.