CARD GAME WITH MULTIPLAYER AND CUSTOM BACKEND
CARD GAME WITH MULTIPLAYER AND CUSTOM BACKEND
CARD GAME WITH MULTIPLAYER AND CUSTOM BACKEND
CARD GAME WITH MULTIPLAYER AND CUSTOM BACKEND
Genre:
Multiplayer Card Game
Genre:
Multiplayer Card Game
Team Size:
2 Unity Developers, Backend Engineer, Game Designer, UI/UX Designer, QA Engineer
Team Size:
2 Unity Developers, Backend Engineer, Game Designer, UI/UX Designer, QA Engineer
Platforms:
PC (Steam)
Platforms:
PC (Steam)
Development Time:
Ongoing / Live Product
Development Time:
Ongoing / Live Product
Our Contribution:
Full-cycle development — card game logic, multiplayer backend, UI/UX, optimization, QA, release support
Our Contribution:
Full-cycle development — card game logic, multiplayer backend, UI/UX, optimization, QA, release support
Engine:
Unity
Engine:
Unity
Monetization:
Premium (Steam)
Monetization:
Premium (Steam)
Overview
Overview
Overview
ThirtyOne Multiplayer is a digital multiplayer card game based on the classic “31 / Blitz” ruleset. Players compete in real time, making strategic decisions around card values, timing, and risk management. The game focuses on clarity, fair multiplayer interactions, and smooth online play.
A key technical goal of the project was building a reliable real-time multiplayer experience with full control over networking behavior. Our team implemented the game using a custom backend and socket-based communication, ensuring low latency, predictable game state synchronization, and scalability for online matches.
Key Features
Key Features
Key Features
Classic card game ruleset
Digital implementation of the traditional “31 / Blitz” card game adapted for online multiplayer.
Real-time multiplayer matches
Online card sessions with synchronized turns and state consistency between players.
Clean and readable card UI
Clear presentation of cards, player states, and actions to avoid ambiguity during gameplay.
Fast round-based gameplay
Short rounds that keep sessions engaging and suitable for online play.
Stable reconnection handling
Support for player reconnects and session recovery during network interruptions.
GAMEPLAY FLOW & SYSTEMS
GAMEPLAY FLOW & SYSTEMS
Turn-based card logic
All card interactions, scoring, and rule validation handled deterministically on the server side.
Match state management
Authoritative game state controlled by the backend to prevent desync and cheating.
Round lifecycle system
Match initialization, card dealing, turn handling, scoring, and round reset handled as distinct phases.
GAMEPLAY FLOW & SYSTEMS
Turn-based card logic
All card interactions, scoring, and rule validation handled deterministically on the server side.
Match state management
Authoritative game state controlled by the backend to prevent desync and cheating.
Round lifecycle system
Match initialization, card dealing, turn handling, scoring, and round reset handled as distinct phases.
GAMEPLAY FLOW & SYSTEMS
Turn-based card logic
All card interactions, scoring, and rule validation handled deterministically on the server side.
Match state management
Authoritative game state controlled by the backend to prevent desync and cheating.
Round lifecycle system
Match initialization, card dealing, turn handling, scoring, and round reset handled as distinct phases.
DESIGN & UI / UX
DESIGN & UI / UX
Design efforts focused on clarity and usability:
readable card layouts and hand positioning;
clear visual indicators for active player, turn state, and available actions;
minimalistic UI to reduce cognitive load;
responsive input and animations to keep gameplay fluid;
layouts optimized for PC screen resolutions.
DESIGN & UI / UX
Design efforts focused on clarity and usability:
readable card layouts and hand positioning;
clear visual indicators for active player, turn state, and available actions;
minimalistic UI to reduce cognitive load;
responsive input and animations to keep gameplay fluid;
layouts optimized for PC screen resolutions.
DESIGN & UI / UX
Design efforts focused on clarity and usability:
readable card layouts and hand positioning;
clear visual indicators for active player, turn state, and available actions;
minimalistic UI to reduce cognitive load;
responsive input and animations to keep gameplay fluid;
layouts optimized for PC screen resolutions.
MULTIPLAYER & BACKEND SYSTEMS
MULTIPLAYER & BACKEND SYSTEMS
A central technical component of the project is its custom multiplayer architecture:
custom backend designed specifically for turn-based card gameplay;
socket-based communication for real-time synchronization;
authoritative server validation of all player actions;
session management, matchmaking, and reconnection logic;
scalable infrastructure ready for increased player concurrency.
This approach provided full control over game logic, security, and network performance.
MULTIPLAYER & BACKEND SYSTEMS
A central technical component of the project is its custom multiplayer architecture:
custom backend designed specifically for turn-based card gameplay;
socket-based communication for real-time synchronization;
authoritative server validation of all player actions;
session management, matchmaking, and reconnection logic;
scalable infrastructure ready for increased player concurrency.
This approach provided full control over game logic, security, and network performance.
MULTIPLAYER & BACKEND SYSTEMS
A central technical component of the project is its custom multiplayer architecture:
custom backend designed specifically for turn-based card gameplay;
socket-based communication for real-time synchronization;
authoritative server validation of all player actions;
session management, matchmaking, and reconnection logic;
scalable infrastructure ready for increased player concurrency.
This approach provided full control over game logic, security, and network performance.
QA & TESTING
QA & TESTING
We ensured multiplayer reliability and gameplay stability through:
multiplayer stress testing with simultaneous sessions;
turn-order and state consistency verification;
network instability and reconnection testing;
bug fixing for edge cases in card logic;
regression testing during live updates.
QA & TESTING
We ensured multiplayer reliability and gameplay stability through:
multiplayer stress testing with simultaneous sessions;
turn-order and state consistency verification;
network instability and reconnection testing;
bug fixing for edge cases in card logic;
regression testing during live updates.
QA & TESTING
We ensured multiplayer reliability and gameplay stability through:
multiplayer stress testing with simultaneous sessions;
turn-order and state consistency verification;
network instability and reconnection testing;
bug fixing for edge cases in card logic;
regression testing during live updates.
OUTCOMES:
OUTCOMES:
Delivered a stable online multiplayer card game on Steam
Implemented a custom socket-based backend for real-time gameplay
Achieved consistent game state synchronization between players
Preserved the classic feel of the original card game in digital form
Built a scalable foundation for future features and game modes
OUTCOMES:
Delivered a stable online multiplayer card game on Steam
Implemented a custom socket-based backend for real-time gameplay
Achieved consistent game state synchronization between players
Preserved the classic feel of the original card game in digital form
Built a scalable foundation for future features and game modes
OUTCOMES:
Delivered a stable online multiplayer card game on Steam
Implemented a custom socket-based backend for real-time gameplay
Achieved consistent game state synchronization between players
Preserved the classic feel of the original card game in digital form
Built a scalable foundation for future features and game modes
Let’s Build Your Next Hit product
Whether you're starting from scratch
or scaling an existing product, our team
is ready to help bring your vision to life.
Let’s Build Your Next Hit product
Whether you're starting from scratch or scaling an existing product, our team is ready to help bring your vision to life.
Let’s Build Your Next Hit product
Whether you're starting from scratch
or scaling an existing product, our team is ready to help bring your vision to life.
@2026 All rights reserved
dreamteam.base@gmail.com
@2026 All rights reserved
dreamteam.base@gmail.com
@2026 All rights reserved
dreamteam.base@gmail.com
dreamteam.base@gmail.com
@2026 All rights reserved
dreamteam.base@gmail.com
