Modbox

Modbox is a multiplayer game-creation sandbox where you build and play games with others online. Its visual scripting system, MBScript, lets you create multiplayer gameplay, AI and physics interactions. Originally released for VR in 2016, Modbox relaunched as Modbox 2.0 for desktop and VR on September 9, 2020.

Create and play together

You can make single-player, co-op and multiplayer games, switching between VR and desktop on PC, or create games in your own environment on an AR device. Creations sync with online players in real time, and you can share them through the Steam Workshop or cross-platform. You can use editor tools while playing, either as tools for your hands or avatar, or in Desktop Editor mode.

Local multiplayer supports up to four players with split screen, keyboard or gamepads, alongside another player in VR. Local players can also play online. You can start a server while playing or editing and use its permission system to control who can administer, edit or play.

Prefabs let you turn creations into reusable parts and share them with other creators. They can contain assets such as 3D models, visual scripting and C# projects, and can include nested prefabs for building larger worlds from reusable pieces.

Build with scripting

MBScript is a drag-and-drop visual scripting system for gameplay, AI and physics. You can work with node-like tools through the Wiring tool or desktop window, or use a Blocks/Scratch-like interface with the same type system as C#. MBScript can also be edited in an in-game text editor with autocomplete, and can be used to create complex AI characters and multiplayer bots.

On PC, the C# Compiler mod lets you add C# code to creations, including new entity components, editor tools, and functions or options for MBScript and Wiring. You can open C# projects in Visual Studio and compile changes while the game is running. Modbox’s game and editor-tool C# source is included in-game as editable reference material.

Physics and interaction

Modbox supports full-body VR simulation and physics-based VR locomotion. Objects are designed for VR interactions such as reloading gun clips and drawing bows, while procedural animation lets desktop players and AI perform the same actions.

To build physics creations, you connect objects in the editor; those connections join them together with physics during play. This supports destruction and dynamic environments. Voxel editing lets you modify and destroy the world while playing.

Edit worlds and interfaces

You can create HUDs and in-world interfaces with UI Entities, using the same visual scripting and Wiring systems as for world creation. The voxel tools can build large terrains with caves, hills and buildings, in smooth or cubic, Minecraft-style forms. Mesh-editing tools let you make meshes from in-game primitives.

Extend Modbox

You can import 3D models, humanoid models, textures and sounds at runtime, then set material properties in the Material Editor. Modbox’s features are organized as mods, including its VR support, Steamworks, uploading, Nvidia Flex liquid and soft particles, and editor tools such as Mesh Editing and Voxel Editing.

Mods can provide assets for creations, such as the Modern Weapons mod, or add features only for local players, such as a VR Spectator Camera. The ModboxSDK Unity package lets you create mods in the Unity Editor, including environments from Unity scenes, entity assets from GameObjects or prefabs, humanoid models from avatars, and new editor tools built in C#.