When the PS Vita launched in 2012, it was marketed as a "console-quality" handheld. While it successfully hosted impressive titles like Uncharted: Golden Abyss , the sheer CPU and RAM requirements for GTA IV’s physics and AI simulation likely exceeded the Vita's hardware capabilities. Community consensus suggests that while the Vita could comfortably handle the "PS2-era" trilogy ( GTA III , Vice City , San Andreas ), the HD-era mechanics of GTA IV were a bridge too far for native hardware. The Missing Link in the Vita’s Library
homebrew app to stream the game from your PC. This allows the game to run at full settings and resolution. PS4/PS5 Remote Play: gta iv ps vita