WaffleMath LogoWaffleMath
K12345678HSBrowse standardsBrowse worksheetsTeacher resources

ONU

ONU takes the classic card-matching formula and gives it a fresh, fast-paced arcade twist. Your goal is to be the first player to shed all your cards by matching them to the discard pile based on color or number. The deck is packed with action cards that flip the game on its head—skip turns, reverse the order, draw extra cards, and wild cards that let you change the color on a whim. With sharp visuals and smooth, responsive controls, every round feels snappy and satisfying. Whether you're facing off against friends on the same device or testing your wits against the built-in AI, ONU keeps the tension high from the first deal to the final 'ONU!' call. The rules are easy to grasp in minutes, but mastering when to hold back your power cards adds a layer of strategy that keeps you coming back. It's the perfect pick for a quick break or a longer session, offering a blend of luck and tactics that appeals to casual players and card game enthusiasts alike.

Card & BoardCardClassicMatching
WaffleMath LogoWaffleMath
Play ONUONU
ONU

Common Core State Standards

Every game supports specific Common Core standards. Browse the full standards library.

MP3Argue with mathMP1Make sense of problemsMP5Use tools strategicallyMP7Use structure3.NBT.A.2Add and subtract within 10004.MD.C.6Measure with a protractor

Practice by Skill

Games by Grade

3rd Grade · 4th Grade · 5th Grade

Share to Google Classroom

What is ONU

ONU is a lively arcade card game that turns quick thinking and color matching into pure fun. Race to empty your hand before anyone else and shout 'ONU!' to claim victory.

How to Play

Each turn, play a card from your hand that matches the top card's color, number, or symbol. If you can't play, draw a card—and use action cards to disrupt your opponents and gain the upper hand.

Tips for Playing

  • Hold onto wild cards until you're stuck or want to force a color change that hurts your rivals.
  • Keep track of what colors your opponents are hoarding and avoid feeding them by changing the color strategically.
  • If you're down to one card, remember to call 'ONU!' early or you might face a penalty.
  • Use skip and reverse cards to break an opponent's momentum, especially when they're about to go out.
  • When you have a choice, play lower-value cards first to keep your hand flexible for later.

Frequently Asked Questions

How many players can play ONU?

ONU supports both solo play against AI opponents and local multiplayer for up to four players on the same device.

What happens if I forget to call 'ONU' when I have one card left?

If an opponent catches you and calls 'ONU' before you, you'll be penalized—usually by drawing two extra cards.

Can I play a wild card at any time?

Yes, wild cards can be played on any turn, and you get to choose the new color that continues the game.

What does the +2 card do in ONU?

When you play a +2 card, the next player must draw two cards from the deck and forfeit their turn.

Is there a scoring system in ONU?

Unlike some variants, ONU focuses on quick rounds where the first to empty their hand wins. You can track wins across multiple rounds for a match.

Can I play ONU offline?

Yes, ONU works fully offline, so you can enjoy it anywhere without needing an internet connection.

Related Card Board Games

Play Solitaire 13Mobile ReadySolitaire 13Play Bridge MatchMobile ReadyBridge MatchPlay Ono Classic CardsMobile ReadyOno Classic CardsPlay SpiderMobile ReadySpiderPlay Fish Master - Go FishMobile ReadyFish Master - Go FishPlay Connect Puzzles ClassicMobile ReadyConnect Puzzles ClassicPlay HeartsMobile ReadyHeartsPlay Tile MahjongMobile ReadyTile MahjongPlay Solitaire Klondike - For full-grownMobile ReadySolitaire Klondike - For full-grownPlay Solitaire Klondike - Treasure IslandMobile ReadySolitaire Klondike - Treasure IslandPlay Klondike Solitaire: arrange the cards by suitMobile ReadyKlondike Solitaire: arrange the cards by suitPlay Animals memoryMobile ReadyAnimals memoryPlay Best DominoesMobile ReadyBest DominoesPlay The Best Freecell SolitaireMobile ReadyThe Best Freecell SolitairePlay Best Pyramid SolitaireBest Pyramid SolitairePlay The best SolitaireMobile ReadyThe best SolitairePlay Best Solitaire Games: SpiderBest Solitaire Games: SpiderPlay Card solitaire "Desire"Mobile ReadyCard solitaire "Desire"

More Games