Foundry VTT

Virtual tabletop platform for TTRPGs. Node.js server, WebSocket-based, extensible via modules and game systems. Current version: v13.

Key Concepts

• Module: Extends/modifies Foundry functionality (like a plugin)
• System: Defines game rules, data schemas, sheets (e.g., dnd5e, pf2e)
• Document: Core data type (Actor, Item, Scene, JournalEntry, ChatMessage, Macro, RollTable, Playlist, Cards)
• Application: UI window class (legacy Application v1, modern ApplicationV2)
• Hook: Event system for lifecycle/render/document events

Module Quick Start