Call of Cthulhu (2014)

Delta Green is a standalone tabletop roleplaying game of modern conspiracy and cosmic horror. Originally a supplement for Call of Cthulhu, the current standalone edition was published by Arc Dream Publishing in 2016. Players take on the roles of federal agents or contractors working for a secret, illegal organization dedicated to containing supernatural threats and covering up the existence of the Cthulhu Mythos to protect the United States. The system it directly evolved from is Call of Cthulhu Description In Delta Green, the horror is not just about monsters; it is about the toll that a life of secrecy and violence takes on the human soul. Agents juggle their high stakes investigations with their crumbling personal lives. They must navigate a world of bureaucratic red tape, government conspiracies, and sanity shattering entities while ensuring that no one, not even their own families, ever finds out the truth. The game is famous for its bleak tone and focus on the cost of the "Great Work." System Overview & Key Features d100 Percentile System The game uses a familiar percentile dice engine. Skills are rated from 01 to 99. To succeed, you must roll equal to or under your skill rating. If the tens and ones digits match (a double) and the roll is a success, it is a critical success; if it is a failure, it is a critical failure. Bonds and Domestic Ruin Agents have Bonds representing their relationships with loved ones or colleagues. When an agent suffers Sanity loss, they can choose to project that trauma onto a Bond to reduce the loss. This mechanically represents the agent coming home and taking their trauma out on their family, slowly destroying their personal life to stay functional in the field. Sanity and Adaptation The game tracks three types of Sanity loss: Violence, Helplessness, and the Unnatural. If an agent experiences enough Violence or Helplessness without breaking, they can become "adapted," making them more resilient to those triggers but less capable of maintaining human empathy and Bonds. Lethality Rating Instead of rolling many dice for heavy weapons like assault rifles or explosives, Delta Green uses a Lethality percentage. If the player rolls under this rating, the target is instantly killed. If they roll over it, the weapon deals a fixed, significant amount of damage instead. The Home Phase Between missions (Operas), players play through a "Home" scene. They must choose how to spend their limited time: fulfilling responsibilities to maintain Bonds, seeking therapy to recover Sanity, or practicing skills. Choosing one often means neglecting the others, leading to a downward spiral of isolation. Special Training and Agencies Character creation is deeply rooted in real world professions. Whether you are a CIA Case Officer, an FBI Special Agent, or a CDC Epidemiologist, your profession dictates your starting skills and the federal resources you can leverage during an investigation. Additional links deltagreen.com - Official Delta Green website arcdream.com - Official Arc Dream Publishing website

Ouroboros: Age of Drowning is an original tabletop roleplaying game with its own setting and unique narrative-focused dice-pool system. Set in a dystopian world after the Meteor Fall, Ouroboros: Age of Drowning combines mystery, forbidden Alchemy, and surreal horror. The technocratic Clockwork Faction enforces a victorian New Order from its industrious Domed Cities, while rising seas consume the world beyond. As members of a League, you make discoveries in a world where Reality is unstable. Investigate strange phenomena, confront Factions with competing agendas, and encounter Aetherika, spirits, folklore made real, and horrors from the Otherworld. Venture into Dreamscapes, where Surreality blurs the boundary between worlds, and confront the Dark Thoughts within yourself as your Shadow grows. The game uses a dice-pool system designed around Traits, Specializations, and Focuses, giving characters different ways to approach problems rather than reducing them to a handful of broad attributes. Investigation, social maneuvering, survival, combat, occult practices, Dreamscapes, and forbidden Alchemy are all handled through the same core system.

Get your table playing in minutes, not hours.   GATEWAY RPG is a free, rules-lite d20 system built for zero-prep adventures, sudden one-shots, and seamless intro sessions. Familiar 5E-style mechanics with all the bloat stripped out, so you can run any genre instantly: neon-soaked cyberpunk streets, grit-filled noir alleys, high fantasy, cosmic horror, and everything in between. The Definitive Edition is now the main book. This is the complete, current version of GATEWAY RPG: updated core rules, solo play, a starter bestiary, and homebrew variants, character sheets all combined into one source. New artwork, professional layout, and everything players and GMs need in a single 132 page PDF. Want the history? Every older version of the rulebook, spanning 2017 to 2026, is bundled in the Legacy Zip below for collectors and the curious. Download the complete PDF bundle. AI Disclosure: This Enhanced Edition of Gateway RPG features some AI-generated artwork and layout assistance. The rules were still hand written by me and human proofread/playtested since 2017. As a one-man passion project with $0 budget, and $0 revenue gain from this game, this edition utilizes AI imagery only to provide a visually richer and cohesive experience while keeping the game entirely FREE. The original Classic Edition from 2017, featuring human-created artwork, is included as a bonus in the download files. However, if you are only looking for a gaming experience completely free of AI-generated assets, the standalone Classic Edition can be found exclusively on its own dedicated product page at https://gatewayrpg.itch.io/gateway-rpg-classic-edition. What’s Inside? Definitive Edition (Main Book): The complete game in one volume. Updated rules, solo play engine, starter bestiary, and homebrew variants. Legacy Zipfile (2017-2026): Every prior version of the rulebook, character sheet, supplement preserved as released. For archivists, returning players, and anyone who wants to see how the game evolved. Core Rules: The streamlined engine for players and Game Masters, in both English and Spanish (Reglas en Español). Character Sheets: Multiple Printable and Form Fillable Character Sheets Ready-to-Play Content: Pregenerated characters and one-shot adventure modules spanning multiple genres. Jump straight into the action. Player's Toolkit: Printable and form-fillable character sheets, a one-page quick reference guide, and the d20 Oracle for solo play. Starter Bestiary: 25 adversaries across 11 settings, from High Fantasy to Space Opera to Lovecraftian Horror. Homebrew Variants: Over 20 pages of optional mechanics, including Spark of Heroism (Inspiration), Pushing for Success (partial success), and genre modifiers for Survival and Cosmic Horror. Pocket Character Sheets: Compact sheets designed for portability. Solo Play Quickstart Zine: A portable, zine-style guide for on-the-go solo adventures. NEW: Android Player Companion App Character Builder: Create custom characters or select from 30 curated pre-mades. Pocket Rules: Quickly search core mechanics and references on the fly. Sheet-Integrated Dice: Roll checks directly from your sheet. Solo Engine: Built-in oracle for quick, on-the-go solo adventures. https://play.google.com/store/apps/details?id=com.aistudio.gatewayrpg.app Designer's Note: GATEWAY RPG grew out of a personal passion for tabletop gaming. Back in 2015, I discovered S. John Ross’s classic 1993 game, Risus: The Anything RPG. It was free, modular, ultra-flexible, and simple to pick up, but as I played more TTRPG's like DND5e, I missed the iconic d20 and the drama of critical hits and misses. I created GATEWAY RPG to capture that same beginner-friendly spirit while bringing back the thrill of the twenty-sided die and being able to use it for any setting. Whether you are running quick one-shots, playing standalone adventures, diving into solo sessions, or modularly introducing advanced rules as your group learns, GATEWAY adapts seamlessly to your table. GATEWAY RPG and Aurican's Lair are a Not-For-Profit Tabletop Roleplaying Game publisher.

FreeVTT is a browser-based virtual tabletop (VTT) application designed to facilitate the play of tabletop role-playing games. Positioned as an accessible alternative to subscription-based platforms, FreeVTT operates entirely free of charge and requires no user registration. The platform is built with a focus on user privacy and local data management, utilizing the user's device for storage rather than centralized cloud servers. It provides a suite of essential digital tabletop utilities, including map rendering, token manipulation, and combat tracking, without implementing premium feature tiers. Description FreeVTT functions as a digital tabletop environment intended for both remote and in-person game sessions. In contrast to many prominent VTT platforms that mandate account creation and rely on external servers to host campaigns, FreeVTT functions entirely within the local cache of the user's web browser. This architectural choice ensures that no user data is collected or transmitted, enabling immediate gameplay without a login process. Furthermore, the application integrates open-license rule systems directly into its interface, providing accessible compendiums for the 2014 and 2024 editions of Dungeons & Dragons 5e, alongside Pathfinder Second Edition.

Pathbuilder 2e is the premier digital character builder and sheet for Pathfinder Second Edition. Created by David Wilson (Redrazors), it is celebrated for its speed, near-perfect rules accuracy, and its comprehensive support for the game’s vast library of content. In a significant move for 2025 and 2026, the app finally expanded beyond Android and Web to include a native iOS and iPadOS release, making it accessible across the entire mobile ecosystem. Description Pathbuilder 2e is the "gold standard" for Pathfinder players who want to navigate the system's deep customization without choice paralysis. It tracks every feat, spell, and proficiency bonus from level 1 to 20, ensuring that characters remain rules-legal at every step. While it lacks the high-budget "Nexus" features of competitors like Demiplane, its utility is unmatched; it allows for rapid "theory-crafting" of builds and exports directly to PDF or Foundry VTT. It is widely considered a mandatory tool for anyone playing PF2e regularly.

Rollful is a hosted dice-rolling API. It rolls dice over HTTP: a request carries a formula, and Rollful parses it, rolls each die through a cryptographically secure generator, and returns every die it rolled rather than only the total. It is not tied to any game system. It knows what 4d6kh3 means and nothing about what the caller uses it for, so it suits a virtual tabletop, a character sheet, a Discord bot, or anything else that needs a roll it can show the working for. The formula grammar covers flat modifiers, advantage and disadvantage, keeping the highest or lowest dice, exploding and penetrating dice, multipliers, several terms in one roll, and tags. The response lists every die with a flag saying which ones counted, so an interface can show the die a keep rule dropped instead of hiding it. A GET request handles a plain formula. POST adds bonuses and tags, and a batch endpoint takes up to 20 rolls in one request. Every response and error has the same documented shape, described by an OpenAPI 3.1 document. There is no account and no API key. Usage is rate limited rather than metered. The homepage carries a form for rolling dice straight from the browser. Rollful is powered by the OpenDice npm package, which is free to use directly in any JavaScript or TypeScript project.