finished2025

Survival Stats: Unity save system

First-person Unity survival demo with multi-slot JSON saves, auto-save and a persistent inventory

Unity 2022.3 · C# · Persistence · JSON · UI · GitHub Actions

Unity demo built around a complete save system, made in October 2025 during the 3rd-year "Data persistence" module.

Context

The module was about saving and loading a game's state. The demo is a test bed: a first-person player with survival stats, an inventory and pickups, everything that needs saving.

What I did

The save system (multiple slots, metadata, auto-save), the save and load interface, the player controller and the inventory.

Links

Private repository.

Saving

SaveSystem (singleton kept across scenes): JsonUtility serialisation into Application.persistentDataPath.
6 configurable slots plus an auto-save slot, each paired with a metadata file so the save list can be shown without loading everything.
Auto-save every 120 s (adjustable), with an on-screen indicator.
Saved data: health, hunger, thirst, stamina, experience, level, position, camera and player rotation, inventory.

Demo gameplay

First-person controller: sprint, crouch, slide (costs stamina).
Pickups, inventory (TAB), pause menu (ESC) with save and load.
Debug keys to change stats and wipe the save.

Tooling

GitHub Actions workflow building Unity (Windows, Android, WebGL).
PowerShell scripts to build and clean the project.