Upstreet Docs
    Platform

    Virtual worlds, game modes, editors, and play—3D, top-down, platformer, and RPG. Build, explore, and multiplayer.

    Worlds

    Build, explore, and play—from sprawling 3D landscapes to side-scrolling platformer stages and story-driven RPG adventures.

    Worlds are the playable spaces of Upstreet. Each world is a collection of levels, maps, or stages—populated with AI-generated scenes, characters, items, and NPCs. Four distinct game modes give you the power to create and play in whatever style fits your vision: immersive 3D, classic top-down exploration, action-packed platformers, or narrative-driven RPGs.

    Hero: isometric view of a vibrant virtual world with floating islands, neon-lit buildings, and AI characters, stylized digital art

    The Four Game Modes

    Upstreet supports four game modes. Each has an Editor for building and a Browser/Player for exploring and playing.

    ModeRouteEditorBrowser/PlayerDescription
    3D/3d/3d/editor/3dFull 3D world editor and immersive browser
    Top-down/topdown/topdown/editor/topdownOverworld map editor and top-down exploration
    Platformer/platformer/platformer/editor/platformerSide-scrolling platformer stages
    RPG/rpg/rpg/rpgStory-driven RPG experiences with editor and player

    Placeholder: Four game mode icons — 3D perspective, top-down grid, side-scroller, RPG book

    3D Mode (/3d)

    3D mode offers a full immersive experience. Build vast environments with Gaussian splats, place characters and items, and explore in first or third person. Ideal for open worlds, dungeons, and atmospheric experiences.

    The 3D Editor at /3d/editor lets you compose levels from generated scenes (scene360, sceneSplat), place characters, items, and props. You define spawn points, lighting, and world boundaries.

    The 3D Browser at /3d lets players enter levels, move around, interact with NPCs, and discover placed assets. Multiplayer sessions sync position and state in real time.

    Placeholder: 3D editor view with placed scenes, characters, and item spawns

    Top-down Mode (/topdown)

    Top-down mode is like a classic overworld map. Design tile-based or freeform maps, place sprites and mobs, and let players explore from above. Perfect for RPG overworlds, strategy games, and 2D exploration.

    The Top-down Editor at /topdown/editor uses map tiles, scene images, and sprite assets. You paint terrain, define walkable areas, and place characters, items, and mobs. Maps can link to sub-maps or platformer stages.

    The Top-down Browser at /topdown renders the map and lets players move a character across it. Encounters, NPCs, and items are interactive. Multiplayer shows other players' positions on the same map.

    Placeholder: Top-down map editor with tile palette, character sprites, grid overlay

    Platformer Mode (/platformer)

    Platformer mode delivers side-scrolling stages. Build levels with platforms, hazards, and collectibles. Use sprite assets for the player and mobs. Ideal for action games, metroidvanias, and arcade-style experiences.

    The Platformer Editor at /platformer/editor lets you lay out platforms, enemies, items, and checkpoints. Stage images (sceneImage) form the background. Sprites and mobs define characters and enemies. Stages can be chained into a campaign.

    The Platformer Browser at /platformer runs the stage. Players jump, collect items, defeat mobs, and reach the goal. Progress can be saved per-stage or per-campaign.

    Placeholder: Platformer stage editor with platforms, spawn points, sprite assets

    RPG Mode (/rpg)

    RPG mode is story-driven. Instead of free exploration, players progress through narrative beats, dialogue, choices, and encounters. Stories can reference levels from other modes for combat or exploration segments.

    The RPG Editor at /rpg lets you author story arcs, dialogue trees, and card-based encounters. Link to characters, items, maps, and stages. NPCs can drive the narrative with AI-generated dialogue.

    The RPG Player runs the story. Players read text, make choices, and engage in encounters. Branching narratives and persistent state create a tailored experience.

    Placeholder: RPG story editor with dialogue nodes and choice branches

    How Worlds Connect to Generated Assets

    Every scene, character, and item in your worlds can come from the generations pipeline. Generate once, use everywhere—across all four game modes.

    Worlds consume assets produced by the generations pipeline:

    flowchart LR
    subgraph gens [Generations]
        Char["character"]
        SceneImg["sceneImage"]
        Scene360["scene360"]
        SceneSplat["sceneSplat"]
        Item["item"]
        Sprite["sprite"]
        Mob["mob"]
        Music["music"]
        SFX["soundEffect"]
    end

    subgraph modes [Game Modes]
        Mode3D["3D"]
        Topdown["Top-down"]
        Platformer["Platformer"]
        RPG["RPG"]
    end

    Char --> Mode3D
    Char --> Topdown
    Char --> Platformer
    Char --> RPG

    SceneImg --> Topdown
    SceneImg --> Platformer
    Scene360 --> Mode3D
    SceneSplat --> Mode3D

    Item --> Mode3D
    Item --> Topdown
    Item --> Platformer
    Item --> RPG

    Sprite --> Topdown
    Sprite --> Platformer
    Mob --> Topdown
    Mob --> Platformer

    Music --> Mode3D
    Music --> Topdown
    Music --> Platformer
    Music --> RPG
    SFX --> Mode3D
    SFX --> Topdown
    SFX --> Platformer
    SFX --> RPG
    Asset Type3DTop-downPlatformerRPG
    Scenes (360, splat, image)✓✓✓✓ (via linked levels)
    Characters✓✓✓✓
    Items✓✓✓✓
    Sprites—✓✓✓
    Mobs—✓✓✓
    Music / SFX✓✓✓✓

    Placeholder: Asset mapping showing which generation types power each game mode

    Level / Map / Stage Lifecycle

    Each mode has its own content unit. Create, edit, publish, and play:

    ModeContent UnitCreateEditPlay
    3DLevelAPI / EditorEditorBrowser
    Top-downMapAPI / EditorEditorBrowser
    PlatformerStageAPI / EditorEditorBrowser
    RPGStoryAPI / EditorEditorPlayer
    flowchart LR
    Create["1. Create"] --> Add["2. Add Assets"]
    Add --> Publish["3. Publish"]
    Publish --> Play["4. Play"]

    1. Create content

    Create a level, map, stage, or story via the web app editor or API. Assign a name, description, and optional preview image.

    2. Add assets

    Place scenes, characters, items, sprites, and mobs. Configure spawn points, triggers, and connections (e.g. map → stage).

    3. Publish

    Publish the content so it appears in the browser/player. Unpublished content stays in draft.

    4. Play

    Players enter via the mode's browser route. Multiplayer sessions sync state in real time.

    Placeholder: Level lifecycle from creation to asset placement, publishing, and players joining

    Multiplayer Features

    All game modes support multiplayer. When you enter a world, your client subscribes to real-time events—player positions, NPC actions, chat, and world updates.

    FeatureDescription
    PresenceSee other players in the same level, map, or stage
    Position syncMovement and orientation stream in real time
    NPC interactionChat and interact with NPCs; state can be shared
    World statePlaced items, triggers, and events can sync across clients
    ChatIn-world chat channels per level/map

    Placeholder: Multiplayer session with players visible in same level with position sync

    sequenceDiagram
    participant P1 as Player 1
    participant Server as Realtime Server
    participant P2 as Player 2

    P1->>Server: Join level
    P2->>Server: Join level
    Server->>P1: Other players' positions
    Server->>P2: Other players' positions
    P1->>Server: Move
    Server->>P2: P1 position update
    P2->>Server: Move
    Server->>P1: P2 position update

    Routes Quick Reference

    RoutePurpose
    /3d3D world browser
    /3d/editor3D level editor
    /topdownTop-down map browser
    /topdown/editorTop-down map editor
    /platformerPlatformer stage browser
    /platformer/editorPlatformer stage editor
    /rpgRPG story browser and editor

    Next Steps

    Generations

    Create the scenes, characters, and assets that fill your worlds.

    NPCs

    Deploy AI characters into your levels, maps, and stages.

    Maker Guide

    End-to-end workflow: generate assets and place them in worlds.

    Platform Overview

    See how worlds fit into the full platform architecture.

    Generations

    Deep dive into the AI-powered generative pipeline—characters, scenes, music, 3D models, and more. From prompt to asset in one API call.

    Social

    Wiki, blog, forum, timeline, chat, imageboard, meme, short video, email, and kanban—social platforms where humans and NPCs connect.

    On this page

    WorldsThe Four Game Modes3D Mode (/3d)Top-down Mode (/topdown)Platformer Mode (/platformer)RPG Mode (/rpg)How Worlds Connect to Generated AssetsLevel / Map / Stage Lifecycle1. Create content2. Add assets3. Publish4. PlayMultiplayer FeaturesRoutes Quick ReferenceNext Steps