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Capture the Flag Rules in Plain Words

There is no one official rulebook for capture the flag. This page shows how most schools and camps play it. Where schools play it differently, the differences are printed and labeled. This page has no sign-up and nothing to buy.

What the game is

Two teams. Two sides of a field. Each team has a flag on its own side. Sneak across the middle line, grab the other team's flag, and carry it back to your side. But if someone tags you on their side, you go to jail.

Players: two teams, the more the better — 6 or more per team is great. What you need: two flags (bandanas, pool noodles, or bright cloth work), and a field with a clear middle line.

Setting up

Split the field in half with a middle line. Each half is one team's territory.
Each team puts its flag on its own side. See the box below — schools disagree about hiding it.
Each team picks a jail: one marked spot on its own side — a tree, a bench, a square of cones. Prisoners from the other team wait there.
Agree on the edges of the field. Out of bounds is out of the game until you come back in.

How the game works

On your own side, you are safe. Nobody can tag you there.
Cross the middle line and you can be tagged. If a defender tags you on their side, you go to their jail and stay there.
Rescue: a teammate who is still free can run to the jail and tag a prisoner. That prisoner is free. See the box — schools disagree about how the walk back works.
Grab the other team's flag and run. If you carry it across the middle line onto your side, your team wins.
If you are tagged while carrying the flag, the flag goes back to its spot and you go to jail.

Ways schools play it differently

Hidden flag or plain-to-see flag: The two big versions. Howcast's published rules say the flag must sit out in the open — plainly visible from at least one side, about 20 yards from the middle line. A published PE lesson plan used in schools allows the flag to be hidden, as long as it can truly be reached and grabbed — and it draws a guard circle 30 steps wide around the flag. Defenders may not step inside the circle until an attacker does.
The free walk back: In many PE rules, a freed prisoner gets a free walk back to their own side — hands up, no tagging — and rejoins the game there. In other versions, freed players must run back and can be tagged again on the way. Agree before the game.
One rescue or a jailbreak chain: Most rules free one prisoner per tag. Some schoolyards let prisoners hold hands in a chain reaching out of jail — tag the near end and the whole chain breaks free at once. That is a schoolyard custom.
Random jailbreaks: In one published PE version, the teacher or leader may shout "Jailbreak!" at surprise times. All prisoners on both sides go free at once.

Official rule, house rule, or schoolyard rule?

Guarding the flag close: Published PE rule in the lesson-plan version: defenders must stay outside the 30-step circle until an attacker enters it. In open-flag games, camping right on the flag is often banned by a house rule instead — same idea, different source.

Tagging with two hands, or grabbing: Not part of the game. A tag is a light touch, like in Tag. Grabbing shirts or tackling is a foul on every field.

Throwing the flag to a teammate: Some groups allow it, some say the flag must be carried. There is no single printed rule — settle it in the huddle before the first run.

Words to know

Territory — your team's half of the field, where you are safe.

Jail — the spot where tagged players wait to be rescued.

Jailbreak — when many prisoners get free at the same time.

Guard circle — a ring around the flag that defenders cannot enter until an attacker does.

Common questions

Can a jailed player reach out and tag a rescuer from far away?

Prisoners must stay in the jail spot. In chain versions, the chain may stretch toward their own side — but a prisoner may not leave jail to make the chain reach.

Can I tag someone on my side if I am standing on the middle line?

The tag must happen on your side of the line. A player with any part still on their own side has not crossed yet.

What if nobody ever gets the flag?

Most groups set a time limit. At time, the team that has jailed more prisoners — or stolen the flag more times in short rounds — wins the day.

Sources: Howcast's published Capture the Flag rules, and a published school PE lesson plan for Capture the Flag. Read in full and rewritten in our own plain words. Where the two disagree — hiding the flag, the walk back, the guard circle — both versions are printed above.