The Happiness Island Growler is a sound-based unlikely myth in Grand Theft Auto IV.
Description[]
Unusual growling noises can be commonly heard in the southern end of Happiness Island, leading to many fan theories on what it could be. The most plausible theory is that the growling is just ambient noise, and not involved with the paranormal. The existence of the growling sounds is disputed in the first place and only a few players have reported hearing them. The myth likely originates with other growling noises reported around the Alderney Casino.