Universal Save System (JSON + Versioning)
SomeTimesAtNight
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Slot-based JSON save/load system for Unity with versioning, demo scenes, and ready-to-extend save components.Universal Save System is a lightweight, customizable save/load framework for Unity that helps developers add persistent game data quickly without relying on third-party dependencies.The package is built around a simple ISaveable workflow. Any object can join the save pipeline by implementing save and load methods, which makes the system easy to adapt for many project types. The included runtime supports JSON serialization, multiple save slots, optional PlayerPrefs storage, version upgrading for older save files, and automatic scene-friendly save management through a central SaveManager.Included example components cover common gameplay needs such as player position and health, inventory data, progression data, and settings data. These scripts are intentionally simple and well-commented so they can be used directly in prototypes or extended for full production projects.The package also includes:A playable demo sceneA main menu scene with save slot actionsSave, load, and delete slot flowDocumentation and quick-start guidesAssembly definitions for cleaner project organizationThis content is highly customizable and suitable for many genres, including survival, RPG, adventure, shooter, sandbox, horror, and simulation projects. It works especially well for developers who want a reusable foundation for local save systems and prefer to expand the data structure to match their own game.Whether you need a starting point for a prototype or a clean base for a production save system, this package is designed to save setup time and make persistence easier to maintain.JSON-based save and load systemMultiple save slotsSave, load, and delete slot supportISaveable interface for custom saveable objectsCentral SaveManager with singleton workflowSave versioning and upgrade pipelineOptional PlayerPrefs storageFile-based local save storageAuto-load on startupAuto-save on application quitExample save components for player, inventory, progress, and settingsDemo main menu scene with slot selectionPlayable demo gameplay sceneWell-commented C# scriptsIncluded documentation and quick start guideAssembly definition files for cleaner integrationNo third-party dependenciesAI was used as a development assistant during package creation for brainstorming, structuring feature ideas, drafting documentation and store text, and helping prototype parts of the editor/runtime C# workflow. All AI-assisted output was manually reviewed, edited, tested, and integrated by the publisher before inclusion in the final package. The shipped package does not include any runtime AI/ML dependency, does not call external AI services, and does not require customers to use AI tools
