What Is D&D? A Beginner’s Guide to Dungeons & Dragons

Dungeons & Dragons has been the name people drop when someone asks “have you tried tabletop gaming?” for over fifty years — and for good reason. It’s the game that taught millions of people what a d20 is, what a Dungeon Master does, and why spending an evening arguing about whether your halfling rogue can pick a lock with a rusty spoon is genuinely one of the best ways to spend a Friday night.

But if you’re new to all of this, “D&D” can feel like an acronym with a lot of homework attached. This guide cuts through the noise. By the end, you’ll know what Dungeons & Dragons actually is, how a session plays out, what you need to get started, and — critically — how to get to the table this weekend without buying a single book.

What Is Dungeons & Dragons?

Dungeons & Dragons is a tabletop role-playing game where a group of people tells a collaborative story together, with rules and dice deciding the outcome when things are uncertain. That’s it at its core. One person — the Dungeon Master, or DM — describes the world, plays the monsters and non-player characters, and sets the scene. Everyone else plays individual heroes, called player characters, who make choices and take actions inside that world.

There’s no board, no single winner, and no script. Think of it like co-writing a fantasy novel with your friends, except you discover the plot as you go. The DM might describe a crumbling city gate guarded by nervous soldiers. Your character — a seasoned wizard or a fast-talking rogue or a literal dwarf with a battleaxe — decides what to do. You might try to bluff your way through, bribe them, sneak past, or just knock down the gate. D&D gives you rules for all of it, but ultimately the story bends around what the players actually want to do.

Published by Wizards of the Coast and now in its 5th Edition (the most beginner-friendly version in the game’s history), D&D sits at the centre of a huge wave of renewed interest in tabletop gaming. If you’ve watched Critical Role, played Baldur’s Gate 3, or read a LitRPG novel with stats appearing in front of someone’s eyes, you’ve already been swimming in D&D’s cultural waters.

How a Session Actually Works

A typical D&D session runs two to four hours, though groups often go longer because someone always has “just one more thing” they want to try. Here’s the game loop in plain language.

The Core Loop: Describe, Decide, Roll

The DM opens by setting the scene — where the party is, what they can see and hear, what’s immediately pressing. Players then say what their characters want to do. Most of the time, things just happen: you walk down the hall, you talk to the innkeeper, you open the door. No roll needed.

When the outcome is genuinely uncertain and failure would matter — picking a difficult lock, persuading a suspicious merchant, leaping across a crumbling bridge — the DM calls for a dice roll. You roll a twenty-sided die (the iconic d20), add a modifier from your character sheet based on how good your character is at this kind of thing, and try to hit a number the DM has in mind (called the Difficulty Class, or DC). Hit or beat it, you succeed. Fall short, and something goes wrong — though rarely in a way that just kills the story dead.

The result gets narrated. The lock clicks open, or the pick snaps in the barrel. The merchant lowers their price, or calls for the city watch. Then the world shifts, and everyone decides what to do next. That’s the entire game, repeated across three hours until someone’s character has either saved the kingdom or accidentally set the tavern on fire.

Combat: When Talking Fails

Combat is the most structured part of D&D. When a fight breaks out, everyone rolls initiative — a d20 plus a modifier — which determines the order of turns. On your turn you can move (up to a set distance based on your character) and take an action: attack, cast a spell, help an ally, dash away, or dozens of other options. You roll to hit, and if you hit you roll damage dice to see how much.

Characters have hit points (HP), and when they hit zero they fall unconscious. Drop to zero three times without healing and your character dies — though many tables use more forgiving rules, especially for new players. Combat can last a few minutes or much of a session, depending on how many monsters the DM decided to put in that particular dungeon.

Between Fights: The Meat of the Game

Here’s a truth that surprises a lot of new players: most D&D sessions aren’t actually about fighting. The richest moments come from exploring strange locations, negotiating with factions, uncovering secrets, and — best of all — watching other players commit to some ridiculous plan that somehow works. The rules support all of it through the same d20 roll system, just applied to skills like Persuasion, Stealth, Arcana, and Athletics.

The Core Building Blocks

Before you sit down at a table, it helps to know what the pieces are.

The Dungeon Master

The DM is the person running the game. They prep the adventure (or run a published one), play every character who isn’t a player character, and make rulings when the rules don’t quite cover what someone’s trying to do. Good DMing isn’t about winning or blocking the players — it’s about making the world feel responsive and real, and giving everyone a story worth telling later.

If you’re curious about what the prep side looks like, session prep in 30 minutes breaks down how to get ready for a session without burning an entire weekend on notes that will never be used.

Player Characters

Each player creates one character — their avatar in the game world. A character has a race (or species in newer editions: humans, elves, halflings, tieflings, and many others) and a class that defines their role and abilities: Fighter, Wizard, Rogue, Cleric, Bard, Ranger, and so on through a full menu of options. They also have six ability scores — Strength, Dexterity, Constitution, Intelligence, Wisdom, Charisma — each with a modifier that gets added to relevant rolls.

Your character also has a background that shapes who they were before the adventure started, and personality traits that exist to help you roleplay them. In practice, you’ll find your character’s voice in the first session, usually by doing something either very brave or very stupid.

For a walkthrough of building your first character from scratch, Your First Character: A Step-by-Step D&D 5E Creation Guide walks you through every decision in order.

The Dice

D&D uses a set of polyhedral dice — that’s the fancy term for dice with more faces than a standard cube. You’ll encounter the d4, d6, d8, d10, d12, and the all-important d20. The d20 handles most checks and attacks. The others mostly handle damage. You can buy a physical set for a few pounds, download a free app, or just use an online roller — none of this requires expensive kit.

If you want a deeper grounding in how the different dice are used across RPGs, Understanding RPG Dice: From d4 to d100 covers it all.

The Character Sheet

This is the single page (or digital equivalent) that holds everything about your character: their stats, hit points, abilities, spells, equipment, and backstory notes. It sounds intimidating but most of the boxes get filled in during character creation and then rarely change. You’ll reference it constantly in your first couple of sessions and barely glance at it by your fifth.

What You Actually Need to Play

The barrier to getting started with D&D is genuinely low. Here’s what you need across a few different budget scenarios.

Free to Start

Wizards of the Coast provides a free Basic Rules PDF at their website that covers the core rules, four classes, and four races — more than enough to play. You’ll also need printable character sheets, which are freely available in the same place. Combine that with any dice roller app and a group of willing friends, and you’re playing D&D for nothing.

D&D Beyond is the official digital platform for rules, character sheets, and campaign management. The free tier gives you access to the basic rules and a solid character builder. For online play, D&D Beyond pairs well with Roll20 or Foundry VTT for a shared virtual table.

Budget Starter Option

The official Starter Set (currently Dragons of Stormwreck Isle) costs around £13–£20 and includes a rulebook, pre-generated characters, an adventure, and dice. It’s designed explicitly for groups where nobody has played before, with the adventure guiding the DM through clear steps. This is the single best purchase for a group that wants everything in one box.

Full Kit

Once you’re hooked — and you will be — the Player’s Handbook is the main rulebook containing all classes, races, and rules. The Dungeon Master’s Guide and Monster Manual round out the core three books for the DM. But honestly, many groups run months-long campaigns using just the Player’s Handbook and published adventures. The toolkit expands as your appetite does.

D&D vs. Other Fantasy RPGs

D&D is the entry point for millions of players, but it isn’t the only game at the table. Knowing how it compares to some of its neighbours helps you work out whether D&D is the right starting point for your group.

Pathfinder 2E is a more rules-detailed system with deeper tactical build options. If your group loves crunching numbers and optimising characters, it’s worth considering. If your group is newer or prefers story over mechanics, D&D’s more streamlined approach wins out. Pathfinder 2E vs. D&D 5E: Which Should New Players Choose? breaks the comparison down in full.

Daggerheart, published by Critical Role’s Darrington Press, has emerged as a compelling alternative for groups who want a more narrative-first experience. Its Hope and Fear dice system changes the emotional texture of play in interesting ways. Daggerheart vs D&D 5e: Which Fantasy RPG Should You Start With? is worth reading if you’re weighing the two.

Savage Worlds takes a different approach entirely — it uses playing cards for initiative and a range of die types for different characters, creating a faster, more cinematic feel. Savage Worlds: The Swiss Army Knife of RPG Systems covers why it has such a devoted following.

The broader ecosystem of indie and alternative TTRPGs is enormous. If you want to explore beyond the mainstream options, Fantasy RPG Systems Ranked: From Beginner to Expert puts them in context.

D&D Beyond the Table

One of the most interesting things about D&D’s cultural moment is how many entry points exist beyond sitting down with a physical rulebook.

Video games have brought D&D mechanics to an entirely new audience. Baldur’s Gate 3 runs on the D&D 5E ruleset so faithfully that playing it genuinely teaches you the system — advantage and disadvantage, spell slots, concentration, saving throws, all of it. Baldur’s Gate 3 Review: The Definitive D&D Video Game Experience goes into why it works so well as both a game and a D&D tutorial. Solasta: Crown of the Magister is another option — lighter in budget, but arguably even more faithful to the tabletop rules. Solasta: Crown of the Magister — The Purest Digital D&D 5E Experience makes the case.

Actual play shows like Critical Role, Dimension 20, and others have normalised watching people play D&D as entertainment. If you want to see how experienced players and DMs handle the flow of a session before you try it yourself, an hour of any of these shows is worth more than an hour of reading the rulebook.

LitRPG fiction often draws directly on D&D concepts — levelling up, class abilities, party dynamics — translated into fantasy novels with an almost game-mechanical feel. LitRPG Essentials: 12 Must-Read Books for Fans of Gaming and Fantasy is a good starting point if you came to D&D from that direction.

Your First Session: How to Make It Happen

If you want to get to the table this weekend, here’s the short version.

Gather two to five friends — one of you will need to DM, at least for the first session. Download the free Basic Rules and character sheets from the Wizards of the Coast website. Each player picks a class and race, fills in the numbers the sheet asks for (the Basic Rules walk you through it), and comes up with a character name and a sentence or two of backstory.

The DM runs a simple opening scene: the party is together in a tavern, or on a road, or at the entrance to a dungeon. Something happens — a fight, a request, a mysterious stranger — and you go from there. Don’t worry about playing the rules perfectly. The first session is about finding the rhythm of the game, and almost every table has that moment where someone rolls a natural 20 at exactly the right moment and the whole room loses it.

When you’re ready for the fuller setup process — session zero, table rules, long-term campaign planning — Complete Guide to Starting Your First TTRPG Campaign covers all of it.

D&D has survived for fifty years because the core of it — a group of people making choices inside an imaginary world and seeing what happens — is genuinely one of the best games humans have ever made. You don’t need a perfect character build or a beautifully painted miniature collection. You need a few people willing to say “yes, and” to each other for a couple of hours. The rest follows.

---

Continue Your Journey

• Your First Character: A Step-by-Step D&D 5E Creation Guide — Build your first PC from scratch with no experience needed
• Complete Guide to Starting Your First TTRPG Campaign — Everything you need for session zero and beyond
• Pathfinder 2E vs. D&D 5E: Which Should New Players Choose? — Compare the two most popular fantasy TTRPGs
• Daggerheart vs D&D 5e: Which Fantasy RPG Should You Start With? — Is Critical Role’s new system a better fit for your table?
• Fantasy RPG Systems Ranked: From Beginner to Expert — See how D&D compares to the wider RPG ecosystem

What’s the biggest thing putting you off trying D&D — the rules, finding a group, or something else entirely? Drop it in the comments and we’ll point you in the right direction.

Want guides like this delivered straight to your inbox? Sign up for the Forst Stories newsletter for weekly RPG content, system spotlights, and GM tips.