Clash Battle – Multiplayer Card Arena Template

Unity template for real-time card arena games: 1v1 battles with troops, spells and buildings, decks, chests, clans and more, playable offline or online with an authoritative Colyseus server.

• Unity 6
• Render pipeline: Universal Render Pipeline (URP) only.
• Required packages: Addressables, Input System, Newtonsoft Json and Unity Toon Shader (com.unity.toonshader).
• Active Input Handling must be set to Both.
• Platforms: Android, iOS, PC and WebGL. Portrait orientation.
• UI built with uGUI and TextMeshPro, with one sprite atlas per menu.
• Optional server: Node.js 20.9 or newer, Colyseus, and MySQL 5.7+ or MariaDB 10.3+. Redis is optional, for running more than one server process.
• Languages: English, Portuguese, Chinese, Japanese and Korean.
• Documentation: online and as an offline PDF inside the package.

Clash Battle Template is a production-ready, server-authoritative real-time card battle game. It includes both the game template and the complete WebSocket server backend.

Create your own Clash Royale-style game without wasting time creating code and mechanics from scratch.

WebGL Demo
Documentation
Discord Community
Developer's website

What's included:

Game Template:

• A complete battle system in the style of Clash Royale with troops, buildings and spells.
• 21 demo cards, king and princess towers, crowns, overtime with double and triple elixir.
• Battles against other players or bots.
• Full meta-game: deck builder, card collection, upgrade system, lootboxes, shop with daily rotation.
• Server-authoritative battles with smooth client-side interpolation for both WebSocket and offline backends.
• Offline mode
• Login (email/password + guest), profile, settings, nickname rename
• Clan system with real-time chat, emotes, donations, member roles, search and clan war.
• Friends list with online status and friendly battles
• Leaderboards
• Battle Pass
• Trophy Road
• Chest Slots
• Battle emotes, victory animations, particle reward FX
• Replay System
• Match history + replay viewer
• Real-time server data update system, exporting with just one click.
• Localization: English, Portuguese, Chinese, Japanese and Korean (LanguageManager, ready for more languages)
• Local + remote update flow (Google Play / App Store / custom JSON)

Customization:

Every game-design-related setting lives in the Editor as ScriptableObjects:

• Units (stats, AI, animations, costs)
• Maps + arenas
• Lootbox reward tables
• Shop offers + rotations
• Currency definitions
• Battle Pass / Trophy Road / Chest Slot rewards
• Clan rules + chat config

The documentation has step-by-step tutorials for creating a new arena and a new card.

WebSocket Backend Server:

• Authoritative battle simulation at 20 ticks/sec (configurable) with delta-encoded state sync.
• REST + WebSocket APIs for auth, matchmaking, shop, IAP, clans, friends, telemetry.
• JWT auth with email/password + persistent guest accounts (device-id based).
• Real-money IAP with server-side receipt validation: Google Play Billing, Apple App Store StoreKit, Stripe Checkout / Payment Intents.
• Auto-reconnect for battle and lobby sockets.
• GM panel with ban / kick / grant currency / set trophies / search players.
• Real-time data push to client
• Telemetry pipeline with crash aggregation
• Multi-region distributed scaling via Redis (optional)

This asset uses the following third-party resources:

LeanTween
License: MIT
Author: Russell Savage - Dented Pixel

UnityHFSM
License: MIT
Author: Inspiaaa

Colyseus Unity SDK
License: MIT
Author: Endel Dreyer

MsgPack Serialization
License: MIT
Author: Denis Zykov

MeshCombineWizard
License: MIT
Author: Gojko Radonjic

UniTask
License: MIT
Author: Yoshifumi Kawai / Cysharp, Inc.

VContainer
License: MIT
Author: hadashiA

UIEffect
License: MIT
Author: mob-sakai

UIParticle
License: MIT
Author: mob-sakai

Other assets, audio, 3D models, etc., are all under the CC0 license.