Official Unity SDK for horizOn: player accounts, leaderboards, cloud saves, remote config, profiles and server-validated runs. Includes editor tools and feature examples. Free, open-source SDK.YOUR GAME, CONNECTEDhorizOn connects your Unity game to player accounts, leaderboards, cloud saves and live game services through a C# async API. The SDK is free and open source under the MIT license.PLAYER ACCOUNTS AND PROGRESS• Anonymous, email, Google and Apple sign-in workflows• Session restore, account checks and display-name updates• JSON and binary cloud saves• Player profiles, cosmetic unlocks and gift codesRANKINGS AND VALIDATED RUNS• Multiple leaderboards with board keys, player ranks and nearby scores• Validated Actions with server-issued run tickets and deterministic seeds• Input hashes, run-start context, server validation results and evidence upload• Validated-score filtering for rankings that require verified runsLIVE GAME SERVICES• Remote configuration and runtime localization• Localized news and announcements• Player feedback and user logs• Crash reports with breadcrumbs and custom context• Transactional email APIsINCLUDED IN THE PACKAGEThe configuration importer connects your project to the backend using a downloaded SDK configuration. The UI Toolkit example window lets you exercise common SDK requests in the Unity Editor. HelloHorizon provides a small end-to-end entry point. Additional example scripts cover individual features, including validation and player profiles.GET STARTED1. Create a project at https://horizon.pm and download its SDK configuration.2. Install the package and its Unity UI dependency.3. Open Window > horizOn > Config Importer and import the configuration.4. Open Window > horizOn > SDK Example or start with a feature example.BACKEND AND SERVICE REQUIREMENTSBackend features require an internet connection, a horizOn account and an API key. The hosted service is separate from the free SDK. Current plans, usage limits and terms are available at https://horizon.pm.An open-source PHP Simple Server is also available for self-hosting. Its supported features and operational requirements differ from the hosted service. Check its documentation before choosing that option: https://github.com/ProjectMakersDE/horizOn-simpleServer.Documentation and source: https://github.com/ProjectMakersDE/horizOn-SDK-UnitySupport and issues: https://github.com/ProjectMakersDE/horizOn-SDK-Unity/issuesREQUIREMENTS• This Asset Store upload was built and smoke-tested with Unity 6000.5.0f1. The SDK is also available through Git/UPM for Unity 6000.0 or later.• Unity UI package (com.unity.ugui 2.5.0 in this Unity 6.5 upload) for the included HelloHorizon sample. The Asset Store package includes this dependency declaration.• Internet access, a horizOn account and an application API key for hosted backend features.• Google and Apple sign-in require provider configuration. Email delivery requires backend SMTP configuration.IMPLEMENTATION• C# Task-based async/await API in the PM.horizOn.Cloud namespace• UnityWebRequest over HTTPS• JSON and binary cloud-save payloads• Feature managers for authentication, leaderboards, Validated Actions, cloud saves, remote config, localization, news, profiles, gift codes, feedback, logs, crash reports and email• Editor configuration importer, UI Toolkit example window and feature samples• Independent of render pipeline• MIT license with inspectable source codePLATFORMS AND LIMITSThe SDK targets Unity platforms with the required HTTPS and UnityWebRequest support. Platform-specific OAuth and network restrictions still apply. Native Apple sign-in uses the bundled iOS bridge. The browser fallback requires an Apple Services ID, redirect URI and redirect-token forwarding.Cloud-save capacity, leaderboard capacity and request limits depend on the configured backend and service plan. The API stores one save payload per user and one score per user per board. Consult https://horizon.pm for current hosted-service limits.AI-assisted coding tools were used during SDK development, maintenance and documentation. AI tools also assisted with store copy and marketing layouts. The gallery screenshots were captured from the actual SDK running in Unity. The source is available under the MIT license. The SDK does not run a generative AI model at runtime.
