5040: Find the Secret Number

CODEBREAKERS is a card-driven deduction game about information and instinct.

Every player hides a 4-digit secret code (all digits different). Play operation cards to scan your rivals — remainders, sums, comparisons, the largest digit — and watch the list of possible codes shrink. When you're sure, decode the full code to eliminate them. But every scan you make is public… unless you spend a Secret.

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▶ CAMPAIGN — CHAPTER 1: N-0

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Join the NDSB codebreakers. Five cases, each with its own rule twist:

• CASE 01 · The Undelivered Cargo — a learning case: one node, one code.

• CASE 02 · Two Owners — race the rival codebreaker Mira Bell for two ownership signatures.

• CASE 03 · 23:17 — every action burns minutes before the train passes the junction.

• CASE 04 · ECHO — recover corrupted logs with a toolkit and no strong cards.

• CASE 05 · A Dead Man's Orders — find the dangerous hospital commands before they execute.

Fully illustrated story scenes, character reactions and an original soundtrack.

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▶ VS AI

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Face up to three AI rivals with different personalities — NOVA the Analyst, ECHO the Disruptor and BYTE the Gambler.

• Classic: last code standing wins.

• Raid: break the NULL-CORE's shield blocks — only the final blow wins.

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▶ MULTIPLAYER (BETA)

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2–4 players with an invite code, public rooms, AI fill-ins, turn timers, emotes, and a schedule board to plan games with friends.

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▶ ALSO

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• Collect cards and build your own deck.

• 3-minute interactive tutorial.

• Full match replays with the complete deduction notebook.

• English / 한국어 — switch any time (🌐 button or Settings).

HOW TO PLAY

Mouse or touch. Keyboard: 1–4 pick a card, S toggles Secret, 0–9 / ⌫ to enter a code.

Requires an internet connection (matches and the campaign run on the game server).

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한국어

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숫자는 숨기고, 진실을 추리하세요.

연산 카드로 상대의 4자리 비밀 코드를 조사하고, 후보를 좁혀 먼저 해독하세요.

캠페인 CHAPTER 1(사건 5개), AI 대전(클래식 · 레이드), 2~4인 멀티플레이, 카드 수집과 덱 편집, 3분 튜토리얼, 경기 리플레이를 지원합니다.

첫 화면의 🌐 버튼이나 설정에서 한국어 / English를 바꿀 수 있습니다.