So, you're thinking about diving into the dark side of the Underground, huh? Undertale's Genocide Route is definitely not for the faint of heart, guys. It's a stark contrast to the game's normally forgiving and heartwarming nature. This playthrough is all about systematically eliminating every monster you encounter, leading to some seriously messed-up consequences. It's a challenging and emotionally taxing experience, but if you're curious about seeing everything Undertale has to offer, or if you're just a completionist at heart, then this guide is for you. We'll walk you through every step of the Genocide Route, from the very first encounter to the final, soul-crushing battle. Just remember, once you start down this path, there's no turning back – the game will remember your actions, and they will have a lasting impact. Are you sure you're ready to face the consequences? Consider this your spoiler warning: we're about to delve deep into the darkest corners of Undertale. The Genocide Route isn't just about fighting; it's about the choices you make and the impact those choices have on the world and its inhabitants. Prepare yourself for a journey that will challenge your notions of good and evil, and leave you questioning the very nature of video game morality. Remember, this isn't just a game; it's an experience that can stay with you long after the credits roll. So, take a deep breath, steel your resolve, and let's begin this Undertale Genocide Route walkthrough. But don't say I didn't warn you!

Getting Started: The Ruins

Alright, so you wanna kick off the Genocide Route the right (or should I say, wrong?) way. From the very beginning of Undertale, your goal is to eliminate every single monster in each area before moving on. This means you'll be grinding encounters until you receive the message "But nobody came." This message is your signal that you've cleared the area and can proceed. In the Ruins, this means wandering around and engaging in battles until you've exhausted the monster population. Don't worry about being merciful; spare no one. This is the path of genocide, after all. Make sure you're actively seeking out encounters; don't just walk from room to room expecting monsters to jump out at you. You'll need to explore every nook and cranny to ensure you've triggered enough battles. Keep an eye out for those telltale signs that indicate a monster is nearby, like rustling leaves or subtle movements. And remember, patience is key. This initial grinding phase can feel a bit tedious, but it's essential for setting the stage for the rest of the Genocide Route. Once you've cleared the Ruins, you'll face Toriel. Now, this is where things get a little…uncomfortable. You'll have to fight her, and you'll have to kill her. There's no way around it. This is a crucial step in solidifying your commitment to the Genocide Route. Be prepared for a difficult fight, as Toriel will be actively trying to avoid harming you. But remember, your objective is to eliminate her, no matter how much it tugs at your heartstrings. Once you've defeated Toriel, the path to Snowdin is open, and the real grind begins. But hey, at least you're one step closer to completing the Genocide Route. Just remember, the consequences of your actions will only continue to escalate from here. So, buckle up and get ready for a wild, emotionally draining ride. You've made your choice, now it's time to see it through to the bitter end.

Snowdin's Slaughter

Once you step into Snowdin, the chilling atmosphere should serve as a stark reminder of the path you've chosen. Your mission remains the same: eradicate every monster in the area. Just like in the Ruins, you'll need to grind encounters until you receive the ominous message, "But nobody came." This means tirelessly wandering around, engaging in battles, and showing absolutely no mercy. Snowdin can feel even more desolate and unsettling than the Ruins, as the once-cheerful town becomes eerily silent and empty. Pay close attention to the environment as you explore; the absence of monsters will be palpable, and the once-bustling town will feel like a ghost town. Make sure you explore every corner of Snowdin Forest and the town itself to trigger all possible encounters. Don't forget to check behind buildings, in hidden pathways, and any other out-of-the-way locations where monsters might be lurking. And be prepared for a potentially lengthy grinding session. Snowdin is a larger area than the Ruins, so it may take some time to exhaust the monster population. But remember, patience and persistence are key. Once you've cleared Snowdin, you'll face Papyrus. This fight is particularly heartbreaking, as Papyrus genuinely believes in you and wants to be your friend. However, on the Genocide Route, you have no choice but to kill him. Be prepared for his dialogue, which will be filled with his characteristic optimism and naivete, making the act of killing him even more disturbing. After defeating Papyrus, continue your journey towards Waterfall, steeling yourself for the challenges that lie ahead. The Genocide Route is a constant test of your resolve, and Snowdin is just one more hurdle to overcome. Remember, the consequences of your actions are irreversible, and the world of Undertale will forever be changed by your choices. So, take a moment to reflect on what you've done, and prepare yourself for the darkness that awaits you.

Waterfall's Wipeout

As you venture into Waterfall, the ethereal beauty of the environment might seem strangely out of place considering your genocidal intentions. Don't let the serene atmosphere fool you; your objective remains the same: eliminate every monster in the area. Grind those encounters until you see that haunting message, “But nobody came.” Waterfall is a bit more intricate than the previous areas, with its winding pathways, hidden grottos, and shimmering pools. Make sure you thoroughly explore every nook and cranny to trigger all possible monster encounters. Pay close attention to the environment; some monsters might be lurking in the shadows or hiding behind waterfalls. Don't be afraid to backtrack and revisit areas you've already explored, as monsters can sometimes respawn in unexpected places. And be prepared for a potentially long and arduous grinding session. Waterfall is a vast and sprawling area, so it may take some time to completely clear it of its inhabitants. But remember, perseverance is key. Once you've purged Waterfall, you'll encounter Monster Kid. This is another emotionally charged moment, as Monster Kid idolizes Undyne and is eager to prove their worth. However, on the Genocide Route, you'll manipulate Monster Kid's admiration to your advantage, ultimately leading to a confrontation with Undyne. Be prepared for Undyne's transformation into Undyne the Undying, a powerful and vengeful warrior who embodies the spirit of hope and resilience. This fight is one of the most challenging in the entire game, as Undyne the Undying possesses incredible strength and determination. You'll need to master your dodging skills and exploit her weaknesses to emerge victorious. After defeating Undyne the Undying, continue your relentless march towards Hotland, bracing yourself for the fiery trials that await you. The Genocide Route is a relentless gauntlet of moral and emotional challenges, and Waterfall is just another test of your resolve. Remember, the choices you make have consequences, and the world of Undertale will never be the same. So, take a deep breath, steel your nerves, and prepare to face the heat of Hotland.

Hotland's Holocaust and The Core's Calamity

Hotland and the Core are the final areas where you'll need to grind encounters before facing the final boss. As always, your goal is to eliminate every monster in these areas. Keep grinding until you get the message "But nobody came." Hotland is filled with dangerous enemies and tricky terrain. The Core is a maze-like structure with deadly traps and powerful security systems. Make sure you explore every corner of these areas to trigger all possible monster encounters. Pay attention to the environment; some monsters may be hidden in the lava flows or lurking in the shadows of the Core. Once you've cleared Hotland and the Core, you'll face Mettaton NEO. This fight is surprisingly easy, as Mettaton NEO is a glass cannon with incredibly high attack power but very low defense. Simply attack him once, and he'll be defeated. After defeating Mettaton NEO, you'll finally reach the final boss of the Genocide Route: Sans. This fight is notoriously difficult, as Sans is a master of dodging and uses a variety of tricky attacks. Be prepared to die many, many times before you finally manage to defeat him. Sans's dialogue will also be particularly poignant, as he reflects on your actions and the consequences of your choices. After defeating Sans, you'll be confronted by Chara, the first human. Chara will offer you a choice: erase the world or not. Regardless of your choice, Chara will ultimately erase the world, bringing the Genocide Route to its conclusion. The consequences of your actions will linger even after you reset the game, as future playthroughs will be affected by your genocidal past. The Genocide Route is a dark and disturbing path, but it's also an important part of Undertale's overall narrative. It explores the themes of choice, consequence, and the corrupting influence of power. If you're willing to face the darkness, the Genocide Route can be a truly unforgettable experience.

Facing Sans: The Ultimate Showdown

Okay, guys, let's talk about the Sans fight. This isn't just any boss battle; it's the boss battle that everyone dreads and anticipates in equal measure. Sans is the final hurdle, the ultimate test of your patience, skill, and determination on the Genocide Route. He knows what you've done. He knows the atrocities you've committed. And he's not going to let you get away with it easily. Forget everything you think you know about Undertale's combat system, because Sans breaks all the rules. He dodges almost every attack, his attacks are rapid and unpredictable, and he inflicts karmic retribution, which slowly drains your HP. He uses bones, Gaster Blasters, and telekinesis to keep you on your toes, and he's relentless in his assault. The key to defeating Sans is learning his attack patterns. This will take time and a lot of trial and error. Be prepared to die…a lot. Each time you die, pay attention to the attacks that got you and try to anticipate them on your next attempt. Practice your dodging skills. You'll need to be able to react quickly and precisely to avoid his attacks. Use your healing items wisely. You'll need them to survive his onslaught. And most importantly, don't give up. The Sans fight is designed to be frustrating, but it's not impossible. With enough practice and determination, you can overcome this challenge. When you finally manage to defeat Sans, it will be a moment of both triumph and despair. You'll have proven your skill as a player, but you'll also have solidified your role as a genocidal maniac. The weight of your actions will be heavy, but the end of the Genocide Route is finally within reach. So, take a deep breath, steel your resolve, and prepare for the ultimate showdown. You're about to face the consequences of your choices, and Sans is the final judge, jury, and executioner.