FreeSame case
Exact-Case Challenges
After solving a certified case, create a challenge link. Your friend receives the same locked case so the comparison is meaningful.
See how it works →Original deduction games · Daily + Infinite
FIFTEEN SYSTEMS.
ONE INVESTIGATOR RECORD.
Solve evidence-driven cases, compare the exact same file with friends, split the evidence in co-op, and compete on results verified by the server — not by the browser.
15 deduction systems4 difficulty levels1 intended answer
HOUSE DAILY / CASE FILESERVER VERIFIED
CASE 047
Cross-reference the evidence
One record does not belong.
The useful clue is rarely the loudest one. Compare the timeline, access record and physical evidence before you commit to a deduction.
Access event loggedVERIFIED
Camera coverage interruptedCHECK
One minute has no supporting record?
Choose how you investigate
Start with the kind of experience you want.
You can ignore every advanced feature and simply solve. The rest of the House becomes available when you want competition, collaboration or community.
Solve solo
Daily files, Infinite cases, Weekly range.
Build a permanent investigator record across fifteen genuinely different deduction systems.
DailyInfiniteWeekly
Explore →Play with friends
Challenge, Rival, or share the evidence.
Send the exact same case, build a shared streak, or open a co-op room where neither partner sees the whole file.
ChallengesRivalsCo-op
Explore →Compete
Asynchronous competition without fake client scores.
Public tournaments, private Pro competitions, global/Rival boards and Investigation Clubs all use verified results.
TournamentsClubsRank
Explore →Join the House
Discuss theories. Publish original cases.
The moderated Caseboard adds comments, spoiler controls, creator cases, referrals and a growing investigator community.
CaseboardUGCReferrals
Explore →Built around trust
Different evidence. Reproducible logic.
Every family contains multiple reasoning archetypes instead of the same exercise with new names. Daily cases are shared, challenge cases are identity-locked, and competitive results are recorded server-side.
15Distinct systems
4+Archetypes per family
1Intended answer
∞Archive cases
Try it before you register
The first Aha comes before the account.
Learn one clean logic pattern in seconds. If you create an investigator file afterwards, onboarding asks what kind of reasoning you enjoy and recommends three real systems — not a generic product tour.
30-second deduction
Who could enter the archive?
Mara was on a verified call at 21:17.Jonah had no archive access.Elena had access and a four-minute unverified window.
The archive
Fifteen ways for evidence to behave.
FILE 01
The Missing Minute
Reconcile cameras, badges, calls and travel times to find the only person who could enter the unrecorded minute.
Every minute has an alibi. Except one.
FILE 02Blackout
Rebuild power states and sight lines to expose the witness whose story cannot be true.
The lights went out. Someone saw the impossible.
FILE 03The Poisoned Table
Track seats, glasses and service events through a deadly dinner.
Everyone touched the glass. Only one had the chance.
FILE 04Chain of Custody
Audit seals, weights, signatures and transfers to locate the compromised handoff.
The evidence changed hands. Somewhere, it changed identity.
FILE 05The Floorplan Lies
Compare measured anchors, dimensions and adjacency to find the room that cannot exist.
The blueprint is perfect. The building is not.
FILE 06One Key Too Many
Match cuts, registries, access permissions and custody to expose the unregistered duplicate.
Every door was locked. So why is there an extra key?
Solve together
A social layer built around the deduction itself.
The invitation is not an empty follow button. It gives both people something concrete to solve, compare, or protect together.
Free2 players
Shared Solve Streaks
A Rival can invite you into a shared streak. It becomes active only after both people consent and counts a day only when both solve at least one Daily.
See how it works →Pro to create2 players
Split-Evidence Co-op
Two investigators receive deterministic File A and File B evidence. The solution stays server-side; collaboration is required to close the case.
See how it works →FreeAsynchronous
Public Tournaments
Join asynchronous competitions where the timer begins on first opening and restarts do not erase penalties. The leaderboard is built from server-verified results.
See how it works →FreePublic or private
Investigation Clubs
Create or join a public or private investigation circle. Club weekly scores are derived from verified unique solves, never browser-submitted points.
See how it works →Community Caseboard
Theory without a spoiler wall.
Post notes, comment, react, report, block, and label spoilers. Creator cases are moderated before publication and their solutions stay server-side until solved.
Investigator progression
Solve → score → streak → mastery → rank.
Unique verified cases build the durable record. Achievements also recognize clean solves, tournaments, co-op, referrals, clubs, community creation and connected books.
Free stays useful
Pro buys depth, not access to the community.
Daily, challenges, public tournaments, Rivals, shared streaks, Clubs, the Caseboard and creator submissions stay free. Pro unlocks unlimited Infinite play plus creation of private tournaments and co-op rooms.
Install & books
Carry the House beyond one browser tab.
Install the PWA on supported devices, keep your investigator archive synchronized, and optionally connect eligible Solve House books without making the printed experience dependent on the website.