Undertale is a pixel-art indie RPG where you control a child navigating an underground world of monsters. Gameplay mixes turn-based decisions—fight, act, item, or spare—with real-time bullet-hell sequences that require precise movement of your soul to avoid patterned projectiles. Most players complete the story multiple times, exploring Pacifist, Neutral, and Genocide routes that dramatically change dialogue, music, and difficulty. While the game looks simple, its high-difficulty paths turn combat into a test of timing and pattern recognition. The Genocide route in particular demands flawless dodging against bosses whose attacks grow dense and unpredictable. Here the PC's job is not delivering high resolutions or fancy lighting, but maintaining a perfectly consistent frame rate and eliminating input lag so your mouse or keyboard movements translate instantly to on-screen action. Common pain points appear when background processes or older hardware cause even tiny frame-time spikes; these can make a bullet pattern feel unfair because the player's soul doesn't respond exactly when expected. Mods that add higher-resolution assets or QoL fixes can increase the load slightly, making a responsive modern system more valuable than it first appears. Before choosing parts, understand that Undertale's internal tick rate is limited—raw FPS numbers matter less than a flat frame-time graph and minimal latency between input and response. A high-FPS-oriented PC for this game therefore focuses on responsiveness over raw graphical horsepower. The goal is a system that stays out of the way during intense encounters so you can concentrate on learning attack tells, perfecting mercy routes, or grinding for the hardest endings without hardware-induced frustration.