Your code is the driver

From a blank chassis to a winning machine

Every battle comes together the same way, and every loss tells you what to fix next.

1. 
   1

   Build

   Choose a tracked, half-track or wheeled chassis and fill its slots: radar, launcher, shield, drive and more. Every part costs build points and weighs something, and every one has a drawback.

2. 
   2

   Program

   Write the program in BCAS, a small language that reads like Python. It runs ten times a second and decides where to drive, where to look and when to fire. Every error shows as you type.

3. 
   3

   Fight

   Up to two minutes in an arena of cover, supply crates, charging points and repair depots. Run out of missiles, energy or health and your program has to deal with it.

4. 
   4

   Improve

   The report shows the result, the totals and what went wrong, in plain words: "Ran out of missiles at 41 s, and never reloaded." Change a line and fight again.

Step through every decision

A battle is played out by your program, one update at a time, so you can watch it think.

contact = radar.contact()

if contact and state.time - contact.seen_at <= 0.2:
    radar.scan(contact.bearing)
    missiles.aim(contact.bearing)

    # Close in to one side of the contact, not straight at it.
    course = contact.bearing + 35
    throttle = 0.9

    # Near enough: go round it instead.
    if contact.range < 90:
        course = contact.bearing + 90

    # Fire only once the turret has come round to the contact.
    on_target = abs(angle_diff(contact.bearing, missiles.turret())) <= 3

    if on_target and missiles.ready():
        missiles.fire()
        debug.log("Shot requested")

From the starter program every new player begins with.

A debugger in your pocket

Pause any practice battle and open the debugger at that moment. Step forwards or backwards by update or by line, and see every value your program set, what each call gave back and the orders it gave.

Stop when a line runs, when a condition comes true (contact.range < 90) or when it fires. The arena follows every step.

Three classes, each one an upgrade

Every vehicle starts in Bronze. Finish high enough in a season and it goes up, with more to spend, more to fit and more room for its program to think.

Then put it up against everyone else's

Your vehicle fights on our servers while you're away. Come back to results, replays and a place in the table.

Free to build, program and fight

Everything you need to learn the game is free. The subscription is for competing, and for the tools that help you win.