Free
With Ads
About
ATECCO is a deduction card game where you guess your rival's secret card from its traits.
Play with a friend on one device, against the CPU, or online.
■ Five ways to play
[Guess What] The main deduction game
Each player picks a secret card, then narrows down the rival's card with Yes/No trait questions like "Can it fly?" Outwit each other using Pass, Mirror, and Name questions.
・2 players on one device / vs CPU / Online
[Memory] A 6×6 memory duel
Match pairs to collect the most cards. Four skills — Peek, One More, Shuffle, and Steal — turn a memory game into a battle of wits.
・Solo time attack / 2 players / vs CPU
[Trait Karuta] A test of reflexes
Grab the card matching the called trait before your rival does. Two-player mode uses landscape view so both players share one board.
・Solo time attack / 2 players / vs CPU
[Card Combo] Hand-building strategy
Collect cards sharing a trait to build combos and score over three rounds. Rarer traits pay bigger multipliers.
・Solo score attack / vs CPU
[Perfect Match] A quiz of insight
Three traits are shown. Find the one card out of four that matches all of them, and chase your best score.
・Endless (3 difficulties) / 60-second time attack
■ 15 themes, 700+ cards
Animals, Foods, Countries, Flags, People, Historical Figures, Vehicles, Sports, Instruments, Dinosaurs, Plants, Inventions, Landmarks, Jobs, and Japanese Prefectures
■ Learn while you play
Every card comes with a piece of trivia, so you pick up knowledge as you play. Browse them anytime in the Card Library.
■ Great for
・Passing one phone around with family and friends
・Playing solo in spare moments
・Learning together with kids
・Facing off online against someone new
No account required. Just open and play.
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What's New in ATECCO
1.3.0
August 20, 2026
Playing with a friend has been rebuilt. ・New "Play with a friend" flow. Create a room and you get a big room code you can send straight to your friend ・New waiting room. Your friend's name and avatar appear when they join, so you start together ・A match now starts only when both players press Start, so the next game can no longer begin while your friend is still on the results screen ・After a match you return to the room and can play again as many times as you like, changing the deck each time ・New deck: Elements & Materials Plus smaller fixes, including a deck list in the room that could not be scrolled.
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