PLAYABLE WORLDS / 09ROGUELITE / DESKTOP BROWSER / IN DEVELOPMENT2026

ROBOT-HORDE ROGUELITE / PLAYABLE BUILD

Scrap
line

Hold the line. Scrap the horde. Get out alive.

PLAY IN THE BROWSER ↗
SCRAPLINE gameplay: the VECTOR runner in a painted blue arena, surrounded by a robot horde mid-explosion
ACTUAL GAMEPLAY / VECTOR HOLDS THE LINE
11 ROBOT SPECIES03 RUNNERS04 CARD RARITIES05 DIFFICULTIES
DEVELOPMENT SYSTEM / 09

A HUNDRED ROBOTS.
EVERY ONE ALIVE.

SCRAPLINE is plain JavaScript on Three.js and WebGL 2. Instanced meshes draw hundreds of robots, each walking on two-bone IK legs whose feet plant in the world, and Rapier physics turns every kill into real debris. Every sound effect and music track was generated with ElevenLabs and is mixed live through the Web Audio API.

JavaScriptSimulation + game systemsThree.jsInstanced robots + post effectsWebGLBrowser GPU renderingWeb Audio APILive mix + dynamic musicElevenLabsAll effects and soundtrackViteDevelopment + production buildNode.jsBuild + audio toolingCloudflarescrapline.sunxproject.comGitHubSource + version history
WHAT MADE THE BUILD DIFFERENT

Nothing is keyframed: gaits, lean, flinches, screams and strikes are springs and inverse kinematics driven by the simulation. A flow field steers the horde around buildings, and the REVENANT's risen are the same robots, rewired to hunt their own kind.

THE GAME / 09

SCRAPLINE is a top-down robot-horde survival roguelite that runs in the browser. Drop into a procedurally generated city sector, survive waves from eleven robot species that walk on procedurally animated legs, level up through rarity cards and reach extraction before the WARDEN arrives. Three runners change how each run plays.

IN THE BUILD

01Eleven robot species with IK legs and procedural animation

02Three runners: scatter shotgun, rocket launcher, necromancer

03Upgrade cards in four rarities, from Common to Legendary

04Physics debris, dynamic lighting and an ElevenLabs soundtrack

THE RUNDEPLOY → SURVIVE → UPGRADE → EXTRACT
  1. 01DEPLOY

    Choose a runner and a difficulty, then drop into a procedurally generated city sector.

  2. 02SURVIVE

    Robots arrive on foot, through wall portals and from the sky. Read the warning cones and rings before each attack lands.

  3. 03UPGRADE

    Every level pauses the fight for three upgrade cards. Build weapons, auto-systems and abilities for this run.

  4. 04EXTRACT

    Hold the extraction zone to leave with your salvage cores, which buy permanent upgrades in the armory.

FIELD RECORDS / IN-GAME CAPTURES

THREE WAYS
TO SURVIVE.

Each runner changes how a run plays, from close-range shotgun control to rocket barrages and an army of the risen.

RECORD / 01SCRAPLINE gameplay: the WRAITH runner firing rockets into a robot horde while a BULWARK charge warning crosses the floor

WRAITH.

Rockets burst on the first robot they meet and tear apart everything around it. A phase dash cuts straight through the horde.

RECORD / 02SCRAPLINE gameplay: the REVENANT necromancer surrounded by purple risen robots fighting the horde

REVENANT.

Every robot it destroys is rebuilt, purple, to fight at its side until it falls again: three risen at first, up to ten with upgrades.

RECORD / 03SCRAPLINE level-up screen with rare, legendary and epic upgrade cards

CHOOSE ONE.

Each level offers three cards in four rarities. Weapons gain levels and damage; abilities scale from common to legendary.

HOW TO PLAY / DESKTOP

TAKE
CONTROL.

Controller recommended; keyboard and mouse fully supported. Left alone, the aim locks onto the nearest robot.

ACTIONKEYBOARD / MOUSECONTROLLER
MoveW A S DLeft stick
Aim + fireMouse + left buttonRight stick + RT
DashSpace / right buttonA / LB / RB
Reroll cardsRX
PauseEscapeStart
PLAYABLE BUILDDESKTOP BROWSER / WEBGL 2

ENTER THE SECTOR

SCRAPLINE runs in a desktop browser (Chrome or Edge recommended) with no install or account. It is a development build: progress, settings and unlocks are saved locally in your browser.

PLAY SCRAPLINE ↗
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