World Activity System for Game Creator 2

Transform Your Open World Into a Living, Breathing Experience

The World Activity System is a comprehensive Unity asset that brings your game worlds to life with discoverable spatial activities and dynamic temporal events. Built specifically for Game Creator 2, it provides a complete framework for creating engaging open-world gameplay without writing complex code.

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More Details: Online Documentation

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World Activity System schedules what happens in your world and when: fixed-location Spatial Activities (shrines, dungeons, secrets) discovered via triggers or proximity, and Temporal Activities (blood moons, boss spawns, merchant arrivals) driven by an EventScheduler with Interval, Time-of-Day, Random Chance, Conditional, Manual and now Weighted selection (a priority queue with interruption threshold, cooldowns, incompatible-event lists and chained events).

Core: 

• A Shader-Graph-style EventChain node editor (Always/OnSuccess/OnFailure links, parallel/wait, cycle and unreachable-node validation, and now copy/cut/paste/duplicate across different chain assets); 
• A`PrerequisiteCache` for cached GC2 condition checks; a 5-tab Scheduler Debug Window (Dashboard, Timeline/Gantt, Performance, History with CSV export, Tools)
• Pluggable time providers (Game Time, Real Time, Custom, or an optional Cozy Weather bridge).

GC2 integration: 20 Instructions, 8 Conditions and 1 Event (On Presence Changed).

New this cycle: an opt-in NPC Presence Schedule component — time-of-day windows, a teleport marker, and GC2 Instruction lists on enter/exit — which is what finally makes the `EncounterCategory.NPC`/`Merchant` tags mean something (note: NPC presence itself is not saved to disk yet); an **Activity Journal** (`IActivityJournalUI` `DefaultActivityJournalUI`, an "Open Journal" instruction — no prefab ships, it falls back to a single text line); Weighted event selection; an opt-in anchor-culling/LOD toggle; and an opt in multiplayer authority guard (fails open with a warning if enabled but nothing is assigned - no netcode package is added as a dependency).

Fixed: player builds no longer fail with a MenuItem compile error (editor code now sits in its own editor-only assembly).

A note on the name: WAS is a world-event and encounter scheduler, not an NPC daily-routine/ life-sim system. The new NPC Presence Schedule narrows that gap for simple "NPC is here at this time" cases, but it is not a full behaviour/routine AI — if that's what you need, this isn't it.

Works with: Game Creator 2 (Core) + Visual Scripting — required. GC2 Stats and Cozy Weather are both optional.

Examples: install via Game Creator → Install…