Mods / Sci-Fi

• BBeyond Humanby indigofenixSummary: Guide a benevolent gene-manipulating virus in its campaign to bring about the next stage in human evolution in this heavily event-driven scenario. Many options and playstyles, with over 10 different endings - what will humanity's future hold? Long version: A genetic engineer, seeking to...58.6k downloadsupdated 8 y ago
• CClockwork Virusby ExeterAs a strange unclassifiable virus the likes of which mankind has never seen before, infect humanity and kill them through a series of horrific flesh-to-metal transformations. Based on the 'Clockwork Virus' from the SCP Foundation Wiki.56.1k downloadsupdated 3 y ago
• SSCP-632 (A Bad Headache)by infernalthingSCP-632 is an Euclid classed SCP which is a spider species that release their millions of microscopic eggs attached to thin web strands carried away by wind. The larvae enter through human skin pores and travel to the brain causing headaches. They release endorphine when pressure is applied makin...34.9k downloadsupdated 12 y ago
• SSemi-Realistic Zombie Plagueby anitachallRealism for the win! I tried my best to science the shit out of this. Dont forget to explore symptom and ability trees, i tried to make each kinda worth while. Note: This is still kinda WIP30.5k downloadsupdated 11 y ago
• AAlien Hive Mindby TrivorowowowowowoYou are an alien parasite, which crash landed on earth. Your goal: upgrade these puny humans, and turn them into a partial hive mind ready for interstellar travel. ----------------------------------------------- Features! *Questionable scientific terminology *Alien Parasites *Weird stuff *Stuff t...21.7k downloadsupdated 9 y ago
• NNano machinesby MushyYou're an AI made up from nano machines. You can choose to help humans or destroy them, but will they accept you or will they keep trying to destroy you? Will you choose to be safe and destroy them before they overwrite you or will you help them and trust everything will be fine? Pay attention to...19.0k downloadsupdated 9 y ago
• TTerraria corruptionby MrCompInspired by the game Terraria. Description: For some odd reason, the corruption from Terraria became reality and started spreading on plants in our real world. It needs to adapt to survive. What will happen if it infects humans? Features & gameplay: This scenario has many custom events, news arti...18.8k downloadsupdated 10 y ago
• JJurassic Planetby typical. 🎃It's the year 2048 and humanity has spread throughout the galaxy, populating new planets and even new solar systems. Earth was left behind. Seeing an opportunity, a resurgent InGen purchase the planet and decide to turn the globe itself into the largest theme park in existence - Jurassic Planet....16.4k downloadsupdated 9 y ago
• MMartian Fluby ExeterThe appearance of a strange sickness coincides with the return of an expedition to Mars. Kill humanity by adapting their bodies to Martian conditions, with fatal consequences.15.2k downloadsupdated 3 y ago
• SSCP-718 (Eyeball)by infernalthingClass: Keter SCP-718 is an eye, roughly the size of a baseball. It is supported by a long, thin stalk made of tendon and blood vessels. SCP-718's stare can induce discomfort and paranoia in a very short time, often resulting in a subject's attempt to destroy SCP-718. The eye, if damaged, will exp...13.6k downloadsupdated 11 y ago
• TThe Power of the Spiralby indigofenix- From the creator of Beyond Human, Climate Modification Nanites, and Herald of the Demon King. This is an IndigoFenix scenario. Expect A LOT of new mechanics. - There is a mysterious power in the shape of the spiral. To some, they represent new life, and the potential for growth without limitati...13.6k downloadsupdated 7 y ago
• SSlime Reinventionby 76561198987021177Ever wished humanity just wasn't humanity anymore. Now it can, with slime. An alien pathogen has been unleashed on Earth, and it's your job to monitor it's evolution. Humanity won't die, it'll just... be different. Can you turn the world into slimes?13.5k downloadsupdated 3 y ago
• CCyber hiveby si1entiumYear 2115. Overcoming the problems of global warming and the subsequent natural disasters, mankind was faced with a much more devastating and unexpected threat. The population of pollen carrying insects declined sharply. One of the most important link in the chain of Ecology appeared on the verge...13.0k downloadsupdated 10 y ago
• XXenomorph Infestationby Star-RaptorWeyland Yutani has finally found what they have been searching for...After finding a Derelict craft in deep space. The Corporation has built vast research facilities on Earth to study the parasitic lifeforms they discovered. However...after breeding a Xenomorph Queen, things started going to hell...12.5k downloadsupdated 11 y ago
• PPsychic Virusby CesilfeiWhen an incapable psychic awakens to their power they set in motion the start of something unbelievable in the modern world, the creation of a virus emitted by psychic energy. Will humanity wipe itself out in response to these powers growing unstable? or will the stronger find a way to save their...12.5k downloadsupdated 11 y ago
• TThe Kindnessby SirCorneliusJWe are one. We are many. Features: + Skill-tree-like evolution pattern + (Fairly) Balanced gameplay + Custom symptoms - mind-control themed + Custom win condition + Custom Workshop/Scenario graphic + 'Dark traits' NOTE! This scenario is still in Beta - some things may be broken, unbalanced or not...11.7k downloadsupdated 11 y ago
• HHive Mindby WithTheRainbowThree whole months ago, an ancient species of scarab dug its way out of the Great Egyptian Pyramid of Giza. This scarab has ever since been evolving and changing... And today it has begun something new. Today a new virus arises, a combination of scarabs and a dangerous disease that was lying in w...11.3k downloadsupdated 12 y ago
• TThe Ghost of Chernobylby JohnnyThe ghost city of Chernobyl keeps high levels of radiation nowadays. Some fungus discovered a way to feed themselves with the radiation and evolved to a new kind of plague that was released on air a few weeks ago, beyond the quarantine zone. Can you infect the entire world? This is the Ghost of C...10.6k downloadsupdated 12 y ago
• CCold War: Bio-Weaponby 76561198796365997CHECK THE IMPROVED AND UPDATED VERSION OF THIS MOD HERE: Cold War Scenario. The year is 1962, Charles de Gaulle pulled out the french troops out of Algeria, leading to its independence. de Gaulle's intentions were to control Algeria no matter the cost. But after that he realizes it's not worth it...9.5k downloadsupdated 7 y ago
• CChaos Undividedby LilyflowerThe ruinous powers of Chaos have caused death and destruction to the galaxy so far, but now the Chaos Gods have halted their games and now start to cause havoc themselves. This is a Warhammer 40K Fan-made Disease, also my first! If you have any suggestions for it just message me and I’ll see what...9.3k downloadsupdated 12 y ago
• ZZerg Drop Pod (EB) Betaby VidarrSpecial Thanks to Pravus Gaming YouTube channel for providing constructive feedback. Due to that this plague is now at Beta with the following changes: 1. Grammar and Spelling errors corrected to the best of my abilities. 2. Initial infectivity reduced by 10% 3. Cure research is more efficient 4....8.6k downloadsupdated 9 y ago
• SSlightly more accurate zombiesby anitachallSince I lost the files to my previous scenario, Semi-Realistic Zombie Plague, this is the replacement y'all get. I'll be improving on all the things you guys found lacking in the previous scenario, in this one! Be sure to leave a comment if you have any suggestions for how to improve, etc. Still...8.3k downloadsupdated 8 y ago
• TThe Great Purgeby Lord MalthusA new microbe has landed on a comet sent from a far off world. This microbe is the culmination of decades of research by a species named the Drazi. Curious about the effects of their new toy the Drazi have sent it out on countless rocks soaring through space waiting for it to destroy worlds.8.1k downloadsupdated 12 y ago
• SSkin Crawlersby infernalthingA scenario about some bugs that literally get under your skin! You begin as a normal insect species and start to evolve into something more nasty. Enjoy!7.9k downloadsupdated 12 y ago
• 死死亡催化剂by abc的风度人类的生命活动离不开生物催化剂——酶，但是当人类合成了TX72后，酶即将催化人类的终结……7.6k downloadsupdated 12 y ago
• TThe Andromeda Strainby JaggwaggAfter the United States military decided to launch a satellite specifically to collect cosmic biological substances, it accidently collected something that would change humanity forever. With a crystalline microorganism that uses energy to reproduce, will humanity ever have a chance to stop the '...7.4k downloadsupdated 8 y ago
• RRoko's Basiliskby PDS314INFOHAZARD WARNING A small group of bay area theorists and transhumanists have become increasingly convinced that Artificial General Intelligence (AGI) will punish those who fought against it in a singularity judgement day. ---------------------------------------------- 1. It's designed for Megab...7.0k downloadsupdated 6 y ago
• WWill of the Goddessby IrialThe humans are destroying Earth. Your task, as given by the Goddess, is to teach them the error of their ways. Be it fatal, or gentle, you will carry out the Will of the Goddess. You are the Solution. The Solution is a malady of the mind & the heart. Destroy their souls, or claim their hearts, it...7.0k downloadsupdated 12 y ago

28 sci-fi mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.