Leonida Stories: a crime city that does not exist in a single file
Open Leonida and the first thing that throws you off is that it isn't there. No textures, no models, no mp3s: the city, the cars, the pedestrians, the weapons and every sound are generated in your browser from primitives and oscillators. This is a three-dimensional crime sandbox that reimagines the two-dimensional game of the same name — and a fully self-contained load that needs no external server.
A four-by-four kilometre city
Leonida is built procedurally: a grid of four-metre tiles carrying buildings, pavements, lamps, parking lots, piers and a runway. A free third-person chase camera, a day/night cycle, honest vehicle physics. You are not running across a backdrop — you are driving a city that has mass, inertia and a handbrake slide.
Wanted: from patrol to helicopter
The law here runs on stars. One star and a cruiser follows you. Then roadblocks and SWAT roll in, and from the fourth star a helicopter appears over the rooftops. You can clear a wanted level for a hundred dollars at a respray — drive in, repaint the body, walk out clean. It is not an abstract "danger meter" but a pipeline that really pulls units onto the street you are standing on.
What to do besides trouble
Eight story missions — from "Welcome to Leonida" to the "Kingpin" — and between them fifteen hidden packages, street races, cartel van runs, a bank heist and the final boss El Serpiente. When the story tires you out there is work: taxi fares with a time limit, or vigilante duty with a five-star rampage. The arsenal runs from bare fists to a rocket launcher, with body armour and a gun shop.
One hand on the controls, the other on the wheel
On foot: WASD relative to the camera, mouse to look, Shift to sprint, left mouse to strike or shoot, right mouse to aim, 1–7 and the wheel to switch weapons. In a car: W/S throttle and reverse, A/D to steer, Space is the handbrake, left mouse shoots from the window. E gets in or out (if the seat is taken it is a carjacking), T calls taxi or vigilante work, R changes the radio station, M the map, C cycles the camera, F5 quick-saves.
Demo mode
The "Demo" button runs an autopilot: the hero walks forward, turns around at a wall and gets into the nearest car. Health, money and the wanted level are still computed by the same game a human plays — the demo is an honest run, not a rigged clip.
The bottom line
Leonida is grown-up scale built from primitives and a synthesizer. It proves a browser can carry an open 3D sandbox with physics, police and radio stations without downloading a single byte of assets. There is nothing to fetch — only somewhere to drive.