The top-secret government facility in Bone County is called 'Area 69' — a crude numerical pun on the real-world Area 51. The name is used completely straight-faced throughout the game, including for the 'Area 53' radio show that broadcasts conspiracy theories about it.
Source: Bone County — CC BY-SA
Aerial view of Bone County's deserts, where Area 69 hides in plain sight — Area 51's immature cousin that the game treats dead seriously
This entire mountain range in GTA San Andreas has a fan-made name Rockstar never officially gave it.
GTA: San Andreas
Players swore they saw cult meetings inside this chapel — but Rockstar never even built the room.
GTA: San Andreas
One lagoon, three horror icons — Rockstar accidentally created a myth factory.
GTA: San Andreas
Ghost bikes haunting the San Andreas countryside? The truth is even weirder.
GTA: San Andreas