Runtime Studio Sandbox Toolkit Bundle


... Create & Edit Terrain ... Import New Assets ... Powerful API for Custom Extensions Runtime Studio provides a powerful API that lets you extend the editor with your own ... What's Included


by Fullscreen Studios


Price History +

Give your players the tools to build, edit, save, and share their own levels directly inside your game.

Please note: The bundle download itself does not contain the assets.

After purchasing the bundle, access each included asset through its Unity Asset Store page using the links above.

Each included asset appears as $0 on the Unity Asset Store and can then be added to your library. If the price does not immediately update to $0, the discount should be applied during checkout.


Supported Runtime Components: Includes player-safe inspectors for a curated set of Unity components: Transform, Animation, Animator, AudioSource, BoxCollider, BoxCollider2D, Camera, CapsuleCollider, CapsuleCollider2D, CharacterController, CircleCollider2D, Light, MeshCollider, MeshFilter, ParticleSystem, Renderer, Rigidbody, Rigidbody2D, SkinnedMeshRenderer, SphereCollider, SpriteRenderer.


Platform Support & Testing: Tested on Windows (IL2CPP and Mono) and WebGL builds. Designed to function within Unity runtime constraints, including WebGL and IL2CPP compatibility.


Input & Keybinding Support: Runtime Studio is designed for mouse and keyboard workflows. All editor hotkeys and shortcuts including free-cam can be rebound through the built-in keybinding settings.


Runtime Studio is not a full Unity Editor running inside your game. It is a lightweight, runtime-friendly editing framework designed for player creation. Due to the nature of runtime environments, some features may behave differently than in the Unity Editor, and certain workflows may have limitations or quirks. The system is designed to remain stable, safe, and extensible for gameplay-focused editing

Runtime Studio – Sandbox Toolkit Bundle

Building a sandbox game with runtime creation tools takes a lot of work. You need a runtime editor, terrain tools, asset importing, saving, and undo support.


Runtime Studio – Sandbox Toolkit brings these tools together in one bundle for Unity.

Give your players the tools to build worlds, edit terrain, and import their own models directly inside your game. Everything is built on top of Runtime Studio and can be extended and customized to fit your game.


💰 Bundle Savings

Get all 3 assets for $139.99 (Individual value: $189.97).

🔥 Launch Sale: 50% OFF for the first 2 weeks!

Get Runtime Studio – Sandbox Toolkit Bundle for $69.99 during the launch period.


🏗️ Build Your Own Runtime Editor

Give your players a familiar, powerful workspace right inside your game. Built on UI Toolkit, the editor looks and feels like a native engine environment.

  • Dockable Layouts: Let players drag, resize, and rearrange windows to fit their workflow.
  • Essential Tools: Move, Rotate, and Scale gizmos with free camera controls.
  • Complete Workspace: Hierarchy, Project Browser, and Inspector panels to manage the scene.
  • Edit & Play Workflow: Players can switch to Play Mode to test their levels, then jump right back to editing.
  • Save & Share: Built-in save/load system. Export compressed package files so players can share levels easily.
  • Persistent Layouts: The runtime editor remembers how players arranged their workspace between sessions.
  • Built-in Undo & Redo: Let players experiment safely with undo/redo support across transform changes, terrain edits, and component tweaks.

🌄 Create & Edit Terrain

Add a complete terrain editor directly into your game. Players can create entirely new terrains or modify existing Unity terrains on the fly.

  • Sculpting Tools: Raise, lower, flatten, and smooth landscapes.
  • Painting: Paint textures, billboard grass, detail meshes, and trees.
  • Expandable Worlds: Generate neighboring terrains dynamically.
  • Integrated Saving: Terrain changes are saved and exported with the player's creation.

📦 Import New Assets

Don't limit players to your built-in prefabs. Let them bring their own creations into your game.

  • Broad Format Support: Import OBJ, FBX, glTF, GLB, PNG, JPG, WAV, OGG, and more.
  • Local or Web: Load files directly from the player's computer or download them via URL.
  • Persistent Levels: Imported assets become part of the saved level file so they can be shared with other players.
  • Runtime Bundle Export: Includes a custom Unity Editor tool to package Unity assets into portable ZIP files for runtime importing.

🧩 Powerful API for Custom Extensions

Runtime Studio provides a powerful API that lets you extend the editor with your own tools, panels, workflows, and systems. Integrate your game's features directly into the editor and customize how it works to fit your needs. Full source code is also included, giving you even more control over the framework.

  • Custom Component Drawers: Build custom runtime inspectors for your scripts with built-in UI fields and styles, without altering your original MonoBehaviours.
  • UI & Panel Extensions: Register custom docked UI Toolkit panels, scene tool overlay buttons, settings menus, and right-click hierarchy actions.
  • Custom Save Adapters: Take control over how component data is serialized, with version-safe state adapters and runtime restoration hooks.
  • Undo/Redo API: Integrate custom scene mutations and editing tools directly into Runtime Studio's built-in undo history.

🎮 Try It Yourself!

Explore Runtime Studio and its plugins directly in your browser via WebGL, or download the Windows build on Itch.io.


📦 What's Included

🔗 Links

🌐 Website | 📖 Documentation | 📚 Setup Guide | 💬 Discord