What are the hardest gta v story mode achievements?

The verified evidence focuses exclusively on Grand Theft Auto IV, a 2008 game set in Liberty City, describing its open-world design and single-player narrative. There is no mention of Grand Theft Auto V, its story mode achievements, or any related challenges. Without evidence specifically addressing GTA V's achievements, no accurate information can be provided. Users seeking GTA V achievement details would need sources directly covering that game's content.