Delta Green

Delta Green TTRPG · Delta Green: The Role-Playing Game

Delta Green

Delta Green places you in the role of investigators who know too much. Modern cities, quiet suburbs, and treacherous backroads conceal impossible truths. Cases begin like a police procedural, then twist into a sense of creeping dread. The atmosphere is tense, grounded, and tragic. It is beloved for its blend of clue-hunting, human drama, and cosmic horror that does not shy away. This is an excellent choice if you enjoy thrillers and the uncanny, or wish to explore Cosmic Horror with a clear mission ahead of you.

With a professional Game Master, a session feels like a sharp investigation under pressure. You interrogate witnesses, sift through evidence, and determine how far to push. Your choices carry weight. Violence is swift and costly. The tone and intensity are tailored to your group, and safety tools are standard. Ideal for beginners who prioritise story, as well as veterans seeking grit. Perfect for 2 to 5 adults, whether in one-shots for tense evenings or linked operations for a slow-burn campaign.

How to play Delta Green

You roll percentile dice, which consist of two ten-sided dice that represent a number from 1 to 100. When attempting something risky, you aim to roll equal to or below your skill level. Describe your actions, ask questions, and follow the clues. The Game Master will only call for a roll when the outcome is uncertain. In combat, decisions are swift and ruthless. When faced with the impossible, you must test your sanity to continue.

You should come prepared with a clear character concept, a few personal Bonds, and a readiness to investigate. A professional Game Master provides the mission brief, engaging NPCs, maps, handouts, and ensures careful pacing. They adjust the mystery and horror to suit your comfort level, ranging from tense to terrifying. If you have specific preferences regarding tone, check GM playstyles and request an investigative, gritty, or psychological focus.

One-shots unfold a single operation in one session. Pre-generated agents are typical, and the story has a distinct beginning and end. Campaigns connect multiple operations with downtime, home scenes, and significant consequences. You will observe stress and secrets accumulate over time, and minor choices may come back to haunt you. The rules remain centred on investigation, consequence, and survival in both formats.

Overhead view of players moving miniatures across a blue fantasy battle map during a tabletop RPG session.
Overhead view of players moving miniatures across a blue fantasy battle map during a tabletop RPG session.

Common questions

Do I need to know the rules before we start playing?

No prior knowledge of the rules is required. The system is simple: you roll two ten-sided dice to generate a percentage. If your roll is below your skill level, you succeed. The Game Master will explain the rules as they arise and keep the game flowing. Your focus will be on choices, clues, and consequences, rather than calculations. If you are already familiar with Delta Green, the GM can incorporate any optional tweaks you prefer. Either way, you’ll be playing with confidence in just a few minutes.

How frightening is it, and how do you manage safety?

Delta Green is intense, adult horror. Themes can include violence, gore, and psychological stress. Before play, your GM establishes lines and veils with you, and employs safety tools like pauses and check-ins during the game. You decide how far to turn the dial, from moody thriller to harsh horror. Consequences matter, but player comfort is paramount. To align tone and content with your preferences, explore GM styles here: GM playstyles.

What group size and session length are most effective?

It shines with 2 to 5 players. Fewer agents create a more surgical and tense atmosphere. Larger teams bring in more skills and crossfire, but also attract more attention. A typical operation lasts 3 to 4 hours. One-shots usually fit into a single session. Campaign play maintains the same session length, with occasional debriefs or home scenes as time permits. Your Game Master will adjust the pacing and clue density to suit the group, ensuring everyone gets their moment in the spotlight.

How does Delta Green differ from D&D?

It is modern, grounded, and investigation-led. There are no classes or levels. You create an agent with skills, a job, and personal connections. Combat is quick, lethal, and typically a last resort. Supernatural elements are rare, unknowable, and perilous to utilise. Sanity and Bonds measure the personal cost of the work. In contrast to D&D’s heroic fantasy and dungeon crawls, Delta Green is more akin to crime drama mixed with cosmic horror and covert operations.

Which edition and ruleset do you use?

Sessions use Delta Green, The Role-Playing Game from 2016. Players follow the rules in the Agent’s Handbook. The GM operates from the Handler’s Guide. Core mechanics include percentile skills, Lethality for certain firearms, and Stress and Sanity with Bonds. If you have specific preferences, the GM can incorporate or omit optional tweaks to suit your group. Both published scenarios and original cases are available to meet your objectives and time constraints.

Should we create our own agents or use pre-generated ones?

Both options are viable. For a one-shot, pre-generated agents allow you to jump straight into the case and come with built-in hooks. For longer campaigns, creating your own agent helps you engage with Bonds and background more deeply. Group creation typically takes around 30 to 45 minutes, using profession templates such as law enforcement, science, military, or academia. You select stats, assign skills, and define Bonds. If you have an existing agent, the GM can adjust them to fit this ruleset.

Can we play online, and what equipment do we need?

Yes. Delta Green works brilliantly online as evidence, maps, photos, and audio clues are easily shared. All you need is a computer, a microphone, and a stable internet connection. The GM will confirm whether to use a virtual tabletop or video chat and will provide digital handouts and a dice roller. In person, just two ten-sided dice will suffice. If you're interested in comparing online options, check out online play platforms.

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Genres you can play in Delta Green

  • Mystery

    Follow the clues, construct timelines, and apprehend the culprit. Think Knives Out, but you are the detective, assembling alibis and…

    View genre: Mystery
  • Gritty

    Difficult decisions, limited resources, and lasting consequences. Picture Game of Thrones, where trust is tenuous, debts must be repaid…

    View genre: Gritty
  • Espionage

    Tradecraft, dead drops, double agents, and high-stakes decisions under pressure. Imagine Mission: Impossible at the table, where every…

    View genre: Espionage
  • Occult

    Candlelit rituals, cryptic symbols, and whispered conspiracies. Imagine The X-Files as you pursue clues through secret lodges and concealed…

    View genre: Occult
  • Conspiracy

    Unravel layers of deception as you follow leads through dimly lit rooms, encrypted files, and betrayals. Paranoia escalates with each clue…

    View genre: Conspiracy

What players have to say

  • Tom was brilliant! He was really great with the kids and very patient with his explanations. It was a wonderful evening and definitely worth doing again! The children asked the next day when we would be doing this again.

    Danny

  • First of all, I want to say that Sebastian was really great as a DM. For his first run as a booked DM, he did an excellent job. The 3 stars refer to the following: 1. We were disappointed that the adventure was labelled a One Shot yet wasn't a complete story. Discovering that there are two more parts wasn't very positive for us, as it meant there was no satisfying conclusion to the story. 2. As new players, it was difficult for us to understand the English character sheets in such a short time. In German, it would have been much easier. Even receiving the character sheets a few days in advance would have been helpful for preparation. 3. More guidance would be beneficial. Especially for beginners, a more linear one shot would have been preferable. We wasted a significant portion of the adventure time doing unnecessary things because we didn't fully understand how the game worked. Overall, I think the StoryForgers concept is really good and I see a lot of potential in it, especially for introducing new players to D&D. I hope you don't take my feedback the wrong way but see it as honest criticism. Best regards, Mario

    Mario

  • Bryan was exceptional. We had a group with varying levels of experience, and he managed to keep everyone engaged and involved. His positive attitude made the game enjoyable for all. I really appreciated how he could clearly explain what was needed from our less experienced players while keeping our more seasoned players on their toes with his deep knowledge of the game. Everyone in our party had a fantastic time thanks to Bryan.

    Jeremy

  • Dayron was fantastic. Well-prepared, punctual, and had a brilliant sense of humour.

    Corey

  • Dayron was fantastic; he provided a brilliant experience. Thanks!

    Casey

    The Merry Meeple

  • The game was really engaging. I got a game as a present for my boyfriend, who is very keen on it, and he was very pleased and appreciated Leonardo's professionalism. I don't have much experience with DnD, but I found the game to be quite straightforward and enjoyable.

    Marina

  • Baptiste was an excellent GM who adapted well to our group and helped us progress in this one-shot. However, there was one issue with the character sheets provided, as they were not complete or clear. Some of the French translations were rather approximate. For instance, our cleric was missing spells, including a healing spell, even though they were meant to have some.

    Pierre

  • Rachel was fantastic; my daughter and her friends left the game saying it was the most fun they’d ever had, and my daughter wanted to sign up for another session with her straight away. She was friendly, and her approach let the players fully immerse themselves in the game by giving them control over how they wanted their actions to unfold. I would definitely work with her again.

    John

  • A nice and clear first experience with D&D. Amber was able to explain and guide the game effectively, allowing us as players to quickly get into the flow and focus on the story. Collaborating with my colleagues to devise attack routes was an enjoyable activity and provided great insights into each other's characters, thought processes, and differences. Overall, I found it to be a very enjoyable session.

    Jens

    Triodos Bank N.V.

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