Welcome to the City of Rickshaws & Reckoning
First and foremost, GTA Dhaka Vice City 20 is not an official product of Rockstar Games. Instead, it is a highly ambitious fan-made modification (mod) built upon the engine of the 2002 classic, Grand Theft Auto: Vice City.
The "20" in the title likely refers to a version number (Version 2.0) or a nod to the 20th anniversary of the original Vice City. However, in the context of the modding community, it has come to represent a "complete edition"—a polished, expansive reimagining of Miami’s 1980s aesthetic replaced with the modern-day texture of Dhaka, Bangladesh.
Imagine replacing the neon-lit Ocean Drive with the gridlocked streets of Farmgate. Imagine swapping Tommy Vercetti’s white suit for a Punjabi and lungi. This mod promises to replace every asset of the original game with localized content.
“Survive the gridlock. Rule the chaos.”
“20 million people. One throne.”
“Dhaka Vice City – You can’t even park here legally.”
It seems you're referring to a game titled "GTA Dhaka Vice City 20" — but no official game by that name exists from Rockstar Games or any major developer. You may have encountered a fan-made mod, a local bootleg, or an unofficial mobile game (common in South Asia) that renames or reskins Grand Theft Auto: Vice City or GTA: San Andreas with a Dhaka (Bangladesh) theme.
That said, I can give you a general review based on common features of such unofficial "GTA Dhaka" mods (often labeled "Vice City 20" as a fake sequel):
The vehicle list has been completely overhauled. You won’t find Cheetahs or Infernuses. Instead, the mod features: