How to play ONE
The ONE card game comes down to a three-sentence core; everything after that is the table's choice. Below is the game itself, then every rule you can change.
Play now →Step by step
- 1
Take your cards
Everyone is dealt 7 cards (a table can set 5 or 10 instead). One card is turned up from the deck to start the discard pile.
- 2
Match colour or number
On your turn, play a card matching the top card's COLOUR or its NUMBER/symbol. A Wild is always legal and you choose the new colour.
- 3
Draw if you can't play
With no playable card you draw from the deck. Depending on the table you either draw one and pass, or keep drawing until something matches.
- 4
Call ONE at two cards
When you play down to a single card you must call ONE. Forget, and anyone who catches you sends penalty cards your way.
- 5
Go out
First player with no cards wins the hand. A table can end after one hand, play on for full rankings, or run to a target score.
The deck
The classic deck is 108 cards: numbers 0–9 in four colours (red, yellow, green, blue), plus Skip, Reverse and +2 in every colour, plus 4 Wilds and 4 Wild +4s.
Skip burns the next player's turn. Reverse flips the direction of play — at a two-player table it acts like a Skip. +2 makes the next player draw two.
A Wild changes the colour. A Wild +4 changes the colour and makes the next player draw four; under official rules you may only play it when you hold no card of the current colour, and that claim can be challenged.
Stacking (+2 and +4 chains)
This is the most argued-about house rule. With stacking off, a +2 is drawn by whoever receives it and their turn ends. With it on, you can pass the penalty along: +2 on +2 makes it four, then six, and whoever can't continue draws the whole pile.
A separate setting decides whether +2 and +4 may be stacked on each other. With cross-type stacking on the table gets genuinely brutal — ten-card penalties stop being unusual.
With stacking on, holding a +2 is defence. With it off, the same card is only ever attack. One setting rewrites the entire strategy.
Calling and catching ONE
The moment you are down to one card you must call ONE. If you don't, anyone at the table can catch you and you draw a penalty.
The catch window is configurable: open until the next player moves, or just a few seconds. Once it closes, a catch no longer counts.
A false catch can carry its own penalty — with that setting on, shouting 'caught you' at random gets expensive.
House rules: 7 and 0
The two most common house rules. Play a 7 and you swap hands with a player of your choice. Play a 0 and every hand shifts one seat in the direction of play.
Each can be toggled on its own. With them on, being down to one card is no longer safe: a 7 across the table takes that card and hands you ten of theirs.
The chaos pack
Five optional cards. Shield absorbs the next penalty. Deflect sends an incoming penalty back to its sender. Trade swaps two hands. Colour Lock freezes the colour for a few turns. Bomb arrives with a counter and goes off in whoever's hand holds it when the counter runs out.
These are OFF by default. Until you turn them on the deck is entirely classic — chaos is opt-in, table by table.
Scoring and match format
The player who goes out scores the cards left in everyone else's hands. Number cards are face value, Skip/Reverse/+2 are 20, Wilds are 50.
Tables run in one of three formats: a single hand, full rankings (play on until everyone is out), or a race to a target score — usually 300 or 500.
Common questions
Is ONE the same game as UNO?
The ONE card game is an independent app in the same family of card games. The core play is familiar — match colour or number — but here every rule is an explicit setting. UNO is a registered trademark of Mattel; this site is not affiliated with it.
Can I play a Wild +4 whenever I like?
It depends on the table. Under official rules you may only play it when you hold no card of the current colour, and an opponent can challenge you; if the challenge succeeds the penalty comes back to you. With that setting off the card plays freely.
Can you stack a +2 on a +2?
By default yes — the Turkish Street Rules preset ships with stacking on. The Classic preset turns it off: whoever receives a +2 draws it and their turn ends.
How many people can play?
Two to four. If you're short, bots take the empty seats at three difficulty levels.
Do I need an account?
No. A display name is all it takes. Nothing beyond the room code or invite link is shared.
What happens if I lose connection?
The table doesn't drop you straight away. The other players vote on waiting or handing the seat to a bot; if they wait and you return, your hand is exactly as you left it.
Can I save a rule set I built?
Yes. Rule sets are stored in your browser and can be shared as a short code; whoever receives it sets up the same table in one move.