Every game developer knows the asset lock-in problem. You buy a beautiful 3D character model for Unity — and now all future characters need to match that style, because finding another artist with the exact same workflow is nearly impossible.
GameVault is our answer: a cross-engine asset marketplace with a universal interchange format.
**The .gas Format**
The core innovation is .gas (Game Asset Specification) — a JSON-based metadata format that describes assets in engine-agnostic terms. An .gas file for a 3D character includes:
- Mesh data (vertices, normals, UVs) in glTF-compatible binary - Animation definitions in a normalized keyframe format - Material properties as physically-based parameters (roughness, metallic, subsurface) - Rig data in a generic bone hierarchy format
Importers for each engine convert .gas to native format: Godot's `.tscn`, Unity's `.prefab`, Unreal's `.uasset`. The conversion happens at import time, preserving all metadata and animations.
**What's on GameVault**
GameVault currently hosts: - 2,400+ 3D models across characters, props, environments - 8,000+ 2D sprites and pixel art - 1,200+ audio tracks and sound effects - 400+ complete character rigs
Our AI generation tools let creators produce variations of existing assets — different poses, color schemes, animation states — without commissioning new work.
**The SDK Ecosystem**
We provide official SDKs for 18 game engines: Godot, Unity, Unreal Engine 5, Bevy, Phaser, Flutter, iOS SpriteKit, Android LibGDX, HTML5 Canvas, and more. The SDKs handle .gas import, caching, and update synchronization.
For engines we don't support natively, the .gas specification is open — anyone can write an importer.
**Creator Economics**
GameVault takes a 30% marketplace fee (industry standard). Creator analytics show earnings per asset type, revenue trends, and buyer demographics. We handle payment processing via Stripe Connect and provide creators with monthly payouts.
We're also piloting a subscription model — "GameVault Pro" gives studios unlimited downloads for $99/month. Early enterprise pilots are underway.