System 1/2 (one-half) is a lightweight roleplaying game system meant for one-shot and pickup games.

You'll need two or more players to play this game, several six-sided dice, a marker, and some way to record notes. In an optimal world you'll have about four dice per player. If you can't muster that many, you can use some kind of token to count as dice and hand those around. The marker is something to denote which player has the focus. The focus will move from player to player in turn, giving each a turn to get more time in the spotlight.

One of these players needs to take charge and setup the game's narrative. This player will take on the role of Narrator for the game. The remaining players will create Characters that are part of the game's narrative. From this point on we will call the narrative of the game the Fiction, to be concise. How these roles work and interact is the very core of the game, so let's explore that.

The player that becomes the Narrator takes over more responsibility than the other players. They game itself may often start with a player going: I have an idea for a game! In that case, they are the prime candidate for the Narrator. The Narrator paints the world, and the people within it, using words. They are in charge of pretty much everything about the setting of the Fiction. However, They may not describe anything about a Character that has not already been established, unless a game rule tells them that they may. The basic flow of the game is the Narrator telling the story of the Fiction, until a Prompt causes them to stop. There are a few types of Prompts, but the most common one is when a question is raised in the Fiction about a Character. Then the player of that Character and the rules are consulted to figure out the result in the Fiction.

As you narrate the game you'll need pencil and paper (or another recording medium) to record Issues. Issues are points to consider in the story that affect one or more players. Issues have types and interact in specific ways with the rules to affect the fiction. Issues can often raise special Prompts for instance.

Each player that is not the narrator will create a Character. A Character is one individual with a prominent place in the Fiction. I'm sure that you've read books and/or watched films, so you have a good idea of what a Character is in a story. The player of the Character is responsible for bringing them to life. You should treat your Character as a role you play in the Fiction. There are many ways to do this, from the simple approach of making a fantastical vision of yourself, to reaching the extreme of intentionally creating an individual quite distinct from yourself and exploring that imaginary individual. No way is right or wrong, and you should experiment and discover what works for you. The Character you create will take part in the story of the Fiction, as you choose. You aren't however the author of your Character's story, just a director. You decide what your character says and does, and even are allowed to create their history and sometimes how they fit into the Fiction. There is never a question of when your input is needed, the rules always clearly call for it. For instance, when a Prompt occurs, the Narrator will engage you and ask questions and using the rules eventually you'll be called upon to narrate your Character's actions and their results, adding that to the Fiction of the game.

As you play you will need pencil and paper (or another recording medium) to record Features of your character. These are important information about them which can influence the rules and therefore the Fiction itself. There are several types of Features and each has its own way of working in the rules.

The Fiction is a shared space in the imagination of the players. It contains the story of the game, and how that relates to the Characters of the player. Ownership of this imagined space lies mostly with the Narrator. Ownership in game terms defines control. The owner of the Fiction at any point has control over the game's unfolding story - what happens next in the context of the current narrative. The owner of the Fiction at any point can be defined very simply: The Narrator owns the Fiction until a Prompt causes that to be suspended. At that point the rules determine how things proceed, and eventually a player of a Character will assume ownership for a short period. At the resolution of the Prompt, ownership returns to the Narrator once more. There are many types of the Prompts, but the basic and most common one is when a question arises in the story about what a Character says or does.

A Prompt stops the narrative of the game, and triggers rules. You follow the rules, and eventually the Ownership of the narrative will switch between players. After the situation in the story is resolved that created the Prompt, control reverts back to the player who had it last. While this is usually the Narrator, it is possible the narration of a player in the game can trigger a Prompt, in which case the rules are consulted and another player takes Ownership of the Fiction. At the end of this, the ownership reverts to the previous player, and then eventually back to the Narrator.

The default Prompt is always triggered when the question of what a Character does or says arises. At this point the player of the Character can describe what they want their Character to do, and then the rules are consulted to see how to proceed. Often things will just go as the player decides, and the Prompt is resolved, and the control of the story returns to the Narrator.

Issues and Features are the nuts and bolts of the machine that is this game. Each lets a player define something of meaning in the Fiction. Issues have to do with the overall plot of the story, while Features focus on how one player fits into it and how we view them.

Each Issue is something interesting going on in the fiction. Specifically something that is meant to drive the narrative forward. It is usually a situation that the Characters can get caught up in, and interact with for better or worse. When the Narrator introduces an Issue, they are saying: This is interesting. We should explore this.

How complex and specific the definition of an issue is depends entirely on the scope of the narrative at any point. That said, very tight scopes don't work as well as broad ones. Remember an Issue is something to explore, not a specific problem with all its details laid out to resolve.

To explain how to create Issues, let's explore a narrative and look at some options.

The Narrator has done the opening narration and essentially: The kingdom of Mercuria is throwing a gala event in celebration of the coming marriage of Prince Duncan to Princess Celeste from across the white sea. All of the warriors of the land have come to celebrate and offer gifts.

In the open discussion after the opening narration, the Narrator suggests the Characters are attendees of the gala and possibly warriors of the land.

The Narrator decides on the initial Issue for the narrative: The Kingdom of Mercuria is flat broke. This is a good Issue because its broad, and it provokes questions. For instance, if the Kingdom is broke, how are they throwing a Gala?

The Narrator shouldn't look too hard at an Issue, but treat it as a starting point for interesting drama. This means they shouldn't figure out the Issue at all. It is a springboard for ideas, and needs to be left at that. The Narrator and players will introduce situations that stem from it, and even create other Issues that spawn from it.

The game is a sequence of periods. Each period is some amount of narration, and is followed by open discussion. Then another period starts. At the beginning of the game, the purpose of each period is clearly defined. After that, they are handled in a directed but open manner. We call those later ones game Rounds. Let's cover the first periods of each game.

During this first period of the game, the Narrator alone sets the tone of the game. The opening narration will be a short but detailed look at the world and introduce at least one Issue. The discussion after this narration is the place to ask questions about the world of the game, and explore character concepts.

After the Opening Narration, each player gets an Introduction period to introduce their character. This begins by just describing who they are in broad strokes, perhaps rather openly to allow them to develop as the game grows. The player of the Character can then set a scene for the Narrator, and that is played out to as their period until its natural conclusion.

Each round is a period determined by the rules and introduced by the Narrator and the Spotlight Character.

Mechanically, the game uses dice to handle the element of chance. When the rules are triggered, generally from a Prompt, the player in question will roll one or more dice. You roll the dice using these rules:

• First, set aside any dice that rolled 1, 2, or 3. These dice are good.
• Look at the results of the good dice. Count the highest as your good result.
• If you have more than one 3, each additional one counts as +1 to the result. A roll of 3, 3, and 1 counts as 4. 3, 3, and 3 would be 5.
• Second, set aside any dice that rolled 6. These dice are bad.
• Roll those dice again, and reduce your good result by the highest amount rolled.
• If this reduces your good result to 0 or below, that is called a Foul.
• If no dice are either good or bad, you either Push and pick up another die and roll again, or you Pull and take your result as 0.

How you interpret the result of a roll depends on the mechanics at play. You can have that explained by the Narrator or look at the rolls section of The Basics.

Dice are currency in System1/2. At any given time a player has a certain number of dice, but never more than five. If a player earns more than five dice they give those dice to the Narrator, and if the Narrator has five dice they are discarded. At the start of each Period, dice distributed as so:

• First the Narrator gets one die for each player, but not more than five.
• Second each player gets one die.
• Third, the player with Focus rolls five dice. Using the rules above, but only counting a good result (disregard other outcomes). With a good result, that player keeps those dice. They also add the result of the roll to their Splendor, a running currency used when introducing Features.
• If dice remain, you pass them to another player that has not yet rolled in this period start. They roll as above, and so on, until the dice are taken or everyone has rolled (Narrator included). If everyone has rolled and dice remain, discard them.