Six curves · one arena · sixty ticks a second

Your line never stops.
Neither does theirs.

Curve2gether is a free multiplayer curve game for six players on six phones. Steer a curve that grows behind you. Touch any trail, yours included, and your round is over. Last one still turning takes the point.

Thirty seconds, cut from rounds the game actually played — seeds 20260922 and 20260931, six bots, nothing staged. Starts muted; the sound is the game's own music.

Hall of fame

The board is one week long.

Ranked by the longest single round anyone survived, and it empties every Monday. An all-time table is won once and then stops being something anyone can enter — someone arriving in month three should still be able to get on it. Rounds with fewer than two people don't count: surviving five bots for four minutes is a fine afternoon and not a record.

The board is in the game as well, under You — and this is the same twenty rows.

Top twenty of the current ISO week, UTC. Names are two indices into two fixed lists of 128 words; this page renders them from the same table the game does, and shows a row unnamed rather than misnamed if the two ever disagree.

The only control

Left half, right half.

Hold the left side of the screen to turn left, the right side to turn right. Let go and you go straight. Your curve is turning or it isn't. All the skill is in when.

Speed
84 units/s
Turn rate
120 °/s
Full circle
3.0 s
Tick
60 Hz, fixed
hold to turn left
hold to turn right
you hit a trail

The only way through

Every few seconds, your curve stops drawing.

That leaves a hole behind you, and holes are the only openings in a board that keeps filling up. A hole is 15.4 units of arena. Your head is 4. Take a collision radius off each edge and you have 7.4 units to aim at, at 84 units a second.

15.4 units of hole 7.4 you fit through their trail you
HOLE_INTERVAL 150 ticks + rand(0, 300) · HOLE_LENGTH 11 ticks · LINE_WIDTH 4 units

Ways to play

Everyone on their own phone.

Six seats, six people, six phones. No passing one device around, no split screen. Bots take any seat nobody claims, and anyone past the sixth can watch on the same code.

Play online

Matched with whoever is queueing. Bots fill the empty seats instead of making you wait.

Play with friends

Read one code out loud. Everyone who types it lands in the same room.

Play vs AI

Four tiers, offline. Plus a daily round on one seed, the same for everyone.

Watch

The same code, without taking a seat. Live, from the seventh person onwards.

What it doesn't do

Nothing to sign up for. Nothing to type.

The short version of the privacy policy. The full one takes a minute to read.

No account
No sign-in, no email, no profile. Open it and play.
No ads, no purchases
Nothing is sold inside the game and nothing is sold about you.
No tracking
No advertising ID, no analytics SDK. This page loads no third-party fonts, scripts or pixels either.
No chat, no name to type
Your name comes from two fixed lists of 128 words. Nobody can send you anything.
Colour is never the only signal
Every seat carries a shape as well as a colour: circle, square, diamond, star. Red and green look alike to one man in twelve.
One button deletes it
Your records, your name and every row you own on the board, gone from the server on the spot.

Answers

The questions we get asked.

Eight of them, answered in full rather than in a link.

What is Curve2gether?

Curve2gether is a free multiplayer curve game for up to six players, one phone each. Everyone steers a curve that moves forward at 84 units a second and draws a trail behind it. Touch any trail, your own included, and your round is over; the last curve still turning takes the point.

What does it cost?

Nothing. There are no ads, no in-app purchases and no paid tier: nothing is sold inside the game, and nothing is sold about you.

Do I have to install anything?

No. app.curve2gether.com is the whole game in a browser — same server, same rounds, and the same players as the phone builds. The Android and iPhone builds are free on Google Play and the App Store, for anyone who would rather have an icon than a tab.

How do I play with friends?

One person opens a room and reads out its six-character code; everyone who types that code lands in the same match. There is nothing to sign up for and no friend list. Seats nobody claims are taken by bots, so a room of two people is still a full arena.

What if there are more than six of us?

Six people play and everyone else can watch. The host shares the same six-character code as a watch link, and whoever opens it sees the match live — the real arena, not a recording, and a few hundred milliseconds behind the players. Watching takes no seat, so a group of ten still all end up in the same game.

Can I play on a computer?

Yes. In a browser the left and right arrow keys are the same control as the two halves of a touchscreen: hold one to turn that way, let go to go straight.

Can I play on my own, or without a connection?

Yes. Four tiers of AI opponent — Rookie, Casual, Sharp and Ruthless — run entirely on your own device, alongside a daily round on one seed that is the same for everyone. Only online matchmaking needs a connection.

What data does it collect?

No account, no email address and no advertising ID. A generated device id and your round results are stored so the weekly board can be built, and one button in settings deletes every row you own from the server. This page loads no third-party fonts, scripts or pixels either. The privacy policy is the long version.