Correct by construction
Bidding, trumps and scoring follow the real rules, with an in-game rulebook players can check mid-hand.
Selected work
HAPZ CASE STUDY / HAPZ original — live on Google Play
CallBreak Arena
A digital Call Break card game built and published by HAPZ, with bidding, trick scoring, AI opponents and a full in-game rulebook.
Project At A Glance
- Genre
- Card / trick-taking
- Platform
- Android
- IP
- HAPZ original
The Experience
Card games live or die on whether the rules feel trustworthy.
Players need to see whose turn it is, what was bid, and why a round scored the way it did. Trick-taking games punish ambiguity, so state and scoring have to be visible at every step.
This is a HAPZ original. We own the IP, and the build is live on Google Play — design, code, art pipeline, store submission and updates all in-house.
PROJECT BRIEF
What the project needed, and what we owned.
- The problem
- A HAPZ original: a digital Call Break where players must trust that bidding, trumps and scoring follow the real rules.
- HAPZ responsibility
- Everything. HAPZ owns the IP — rules engine, AI opponents, UI, scoring and the Play release.
- Technical challenges solved
- Full trick-taking logic enforced so game state is always correct and inspectable; three AI opponents that bid and play plausibly; an in-game rulebook players can check mid-hand.
- Platform & technology
- Unity · Photon PUN · Android
- Project status
- Released — live on Google Play
- Verified result
- Published on Google Play and maintained by HAPZ.
WHAT HAPZ DELIVERED
The work we owned on this build.
End-to-end delivery
Designed, built and published by HAPZ: rules engine, AI opponents, UI, scoring and the Google Play release.
Rules engine
Full Call Break trick-taking logic — bidding, trumps, card ranking and per-round scoring — enforced so game state is always correct and inspectable.
Bot opponents
Three AI players that bid and play plausibly, so a solo game still feels like a table.
UnityPhoton PUNAndroidHAPZ original IP
FROM THE GAME
Screens from the live build.
Production Conversation
What this kind of game asks of a production team.
Readable table
Turn order, calls and scores stay legible on a phone screen.
Solo that feels social
AI opponents that behave like players rather than a scripted sequence.
Bring The Right Context
Building something with a similar production challenge?
Bring the game loop, target platform, current build, or the milestone that is under pressure. We will help you find the most credible next step.