Remedy Entertainment, the studio behind Max Payne, paid tribute to Vice City's Ocean View Hotel by naming locations after it in both Control (Oceanview Motel) and Alan Wake 2 (Oceanview Hotel).
Source: Ocean View Hotel (3D Universe) — CC BY-SA
The first vampire in GTA was voiced by a real occultist who cursed the radio host live on air.
GTA: Vice City
This biker's shirt sparked a decade-long alien conspiracy in Vice City
GTA: Vice City
The restaurant in Liberty City was named after a character Rockstar barely used.
GTA: Vice City
Sonny's 'barbarity' had a dress code: cement shoes and closet hangings.
GTA: Vice City