GamesThird-person driving

Courier

Every parcel, on time, across the valley. Hover-bike parcel delivery across a 1.28 km procedural valley, built to see whether the engine fits a game unlike Shroud.

The game

Hover-bike parcel delivery across a 1.28 km procedural valley: eight towns, ten farms, roads, lakes, forests and a mountain rim. Pick up parcels, deliver before par and keep your streak alive until the shift clock runs out. Everything is procedural; there are no asset files.

It was built to test the engine on something unlike Shroud: third person, open map, driving. Everything it needed that a third game would also need went into the engine.

~3,150
lines of game code, on the engine’s ~14,300: 8.3 ms
average frame: ~1,120
of 7,835 meshes drawn

Where the line falls

From the engine

Menus and screensMenuConfig, a shift-select and a records screen with register_screen, and a sticky results screen.
SettingsIts own CourierSettings section with Gameplay and Camera tabs ahead of the engine’s Controls, Video and Audio.
SceneryStreamAbout 9,000 props streamed by cell. Colliders are spawned once, outside streaming.
Metrics, control port, tracecourier.* control commands and its own metrics keys behind the dev feature.

In Courier

Terrain and propsNoise, the fixed map layout of towns, farms and roads, and where every house, tree and rock stands.
The bikeHover physics on avian: ray hover, steering, grip, boost, hop and reset.
Shift rulesJobs, par times, scoring, streaks and records, pure and tested.

Screens

Courier main menu in yellow: Start shift selected, records, settings, quit, over a valley flyover — Main menu, accent re-branded

Courier shift select: Sprint, Standard and Marathon cards with Standard selected, a steering assist toggle — Shift select, a registered screen

Courier camera settings: distance, height and swing speed sliders — Its own Camera tab

Courier: riding into a town square with houses and a silo, the next stop named at the top — Crowe’s Silo, a pickup stop

Courier paused on the road: Resume selected, restart shift, settings, main menu, quit — Pause menu

Courier in the metrics window: frame, CPU, GPU and memory charts and a runs table — Metrics window

What the engine gained from it

ChaseCameraThird-person follow for any root entity: trails the heading, looks ahead, orbits with the mouse and pulls in front of walls.
MeshKitLow-poly vertex-coloured meshes from primitives, for games with no models.
DataDir JSON savesRecords saved next to settings.json with the same atomic writes and corrupt-file handling.
SunSetupOpen maps need shadows to about 300 m with 4 cascades; the arena sun stopped at 90 m.
Two gotchas, now documentedA game names bevy in its own Cargo.toml so derives resolve. SpatialQuery plus a mutable Position query needs a ParamSet.

courier/src/menus.rs

.insert_resource(Theme::default().with_accent(Color::srgb(1.0, 0.78, 0.22)))
.insert_resource(MenuConfig {
    eyebrow: "Hover-bike parcel delivery",
    main_items: vec![
        ("Start shift", MenuAction::Open("shift")),
        ("Records", MenuAction::Open("records")),
        ("Settings", MenuAction::Settings),
        ("Quit", MenuAction::Quit),
    ],
    ..default()
})