R.E.P.O. is a co-operative horror game released in early access in 2025 by Swedish studio Semiwork, where players retrieve valuables while avoiding monsters. The Apex Predator takes the form of a small yellow duck that follows whoever notices it and turns aggressive if damaged or picked up. Clips of its harmless looking patrol spread quickly on gaming social feeds, making its short notice cue function like a classic enemy spotted cue for fans. The sound stays popular in edits because it instantly signals unwanted attention from this particular enemy.