Grand Theft Auto IV is a third-person open-world action-adventure set in a detailed recreation of New York called Liberty City. Players follow Niko Bellic through a story-driven campaign filled with missions, driving, shooting, and free-roam exploration across a living city packed with traffic, pedestrians, and destructible physics objects. On PC the Complete Edition is the standard version, but the 2008 port has aged poorly in terms of optimization. Most players today treat it as a single-player experience enhanced by community mods rather than the largely inactive multiplayer. The game is overwhelmingly CPU-heavy due to its RAGE engine's poor threading and heavy reliance on single-threaded draw calls, traffic simulation, and physics calculations during chases or crowded street scenes. This creates the title's most notorious pain point: frequent micro-stutters and inconsistent frame pacing even on hardware that exceeds the original specs. World streaming while driving is another common source of hitching, especially without fast storage. Visual quality is secondary for most; the base graphics look dated, so players install tools like FusionFix and DXVK to translate the game to Vulkan, improve smoothness, and enable optional visual mods. Before choosing a PC, understand that raw GPU power delivers limited returns on vanilla GTA IV. The real priority is a processor that can sustain steady frame delivery under the game's unpredictable CPU spikes. Many hardware mistakes come from pairing high-end graphics cards with weak or older CPUs, or skipping the essential mod setup that modern systems need for this legacy title. A balanced modern build that favors strong CPU performance, fast RAM, and quick storage will remove the technical frustration and let the game's strong narrative and physics shine.