Unity Systems with Full C# Source Code
Ready-made Unity systems you can import, play in a demo scene and ship in your game: inventory, save and load, doors with keys and keypads, a shop, traffic AI, replays, breakable objects and more.
Every system comes with the full commented C# source, a README and original low poly art you can use in commercial games. They are small on purpose: each one is a few readable scripts you can learn from and change, not a black-box framework.
3 unity systems
FREE EDITION10 Game Systems for Unity: Doors, Inventory, Save, Shop & RPG
Unity 6 · URP · C# source + demo
FREE EDITION10 Game Systems for Godot 4: Doors, Inventory, Save, Shop & RPG
Unity 6 · URP · C# source + demo
FREE EDITIONHorror Essentials: PSX Horror Template for Unity 6 & Godot 4
Unity 6 · URP · C# source + demo
Questions
Unity 6 (6000.3) or newer with the Universal Render Pipeline (URP) and the Input System package, which new Unity 6 projects already include. Needed tags and layers are created on import.
Yes. Every script ships as full C# source with comments, so you can read it, change it and extend it.
Yes. The code and the original low poly art can be used in your games, commercial ones included. You can't resell the system itself.
Yes. The systems are versioned on itch.io and updates are free: download the newest file from your itch.io library.