STR///STUNT TRACK RACERSCRAP METAL. SERIOUS AIR.
CHECKING PIT RADIO
THE BACKYARD STUNT CHAMPIONSHIP

STUNT
TRACK
RACER.

Three laps. No safety net.
Built from scrap. Driven on borrowed time.

Optional rain, oil, fog, ice or heat. Level 1 awards 1.5× XP.

Finish three laps to unlock the next track.

YOUR QUESTIONABLE MACHINE

THE MUD MAULER

V8 / TUBE FRAME / MOSTLY STOLEN-LOOKING PARTS

4×4FINITE BOOST TANKZERO WARRANTY
MOBILE DISPLAY · PHONE DETECTED

GO
FULLSCREEN.

The game will enter fullscreen whichever way you are holding the phone. If you are in portrait it will also ask the browser to switch to landscape.

Some browsers refuse orientation locking. Fullscreen will still be requested; rotate the phone manually if it stays portrait.
MOBILE DRIVER CONTROLS LANDSCAPE

TWO THUMBS.
SLIDE TO DRIVE.

Touch is the default. Rest each thumb on its outside DRIVE pad. Your active side steers: left thumb steers left, right thumb steers right, and both together hold the truck straight. Steering is deliberately 30% softer on mobile.

OUTSIDE · ▲ DRIVEDrive normally. One thumb drives and turns; both thumbs drive straight.
SLIDE INWARD · BOOSTMove either thumb toward the centre of the screen. DRIVE carries for 0.2 seconds while you cross onto boost.
SLIDE BACK · BRAKE / REVThe lower pad spans the full width so you can pull a thumb straight back. Brake/reverse responds immediately.

Every mobile load offers fullscreen. In portrait the same action also requests landscape, and the persistent SWITCH TO FULLSCREEN LANDSCAPE button remains visible if you dismiss it. Tilt remains optional below and never blocks START.

The control zones only capture touches during a race. Garage buttons, START, pause and account controls remain ordinary taps.

OPTIONAL TILT SENSORTHUMBS STEER LEFT / RIGHT
THUMB MODE ACTIVE

Thumb controls are active.

MODE: THUMB TOUCH
OPTIONAL MOBILE TILT

WANT TILT?
ENABLE IT FOR THIS SITE.

No live tilt data is reaching the game.

Android Chrome / Brave / Edge
Open the browser's site controls or site settings for this page → Permissions → Motion sensors → Allow. Then reload this page. Brave may not show a permission popup at all, so the site setting is the important bit.

iPhone / iPad Safari
Tap ENABLE TILT first. If no prompt appears, check Safari's Motion & Orientation Access setting, return to this site, and reload.

Tilt is optional and requires HTTPS. Thumb controls do not need sensor permission. Changing a browser sensor permission often does not take effect until the page is reloaded.
DRIVER'S BRIEFING

FAST IS EASY.
LANDING IS THE BIT.

A heavy, loose 4×4, not a slot car. Brake before corners, make small steering corrections and expect the rear to slide. There are no invisible fences on open edges.

W / ↑ThrottleBuild speed on the run-up.
S / ↓Brake / reverseBrake first. Keep holding at a standstill to engage reverse. W brakes reverse, then drives forward.
A D / ← →SteerHeavy steering with sideways slip.
SHIFTHold to use boostDriving transfers fuel from the visible bonnet tank into the ready bar. Hold Shift to spend it. A stock bar lasts 1.67 seconds. Boost heats the system, fades above 82% and locks at 100% until it cools to 55%. No stationary refill or air thrust; tank parts change capacity and force, while pits refill one third of equipped capacity and cool the system.
SPACEHandbrakeRotate the truck. Also a good way to meet the ground.
Q / EAir rollRotate the body without changing your flight path. A crooked landing can crack the cage.
RRecoveryRoll back to a safe run-up, well before the jump. A helicopter lifts and returns you for two seconds, then lowers you onto the road during a three-second cooldown. Driving is locked; the race clock keeps running for five seconds total, with no extra time charge. A repair-bay service is still three seconds. An off-track crash adds three minor cracks and restores one third of equipped boost capacity so the retry cannot strand you without fuel.
C / ESCCamera / pauseCockpit and chase views. Switching tabs pauses the race.

Foundry, Whiteout and Skyhook's enlarged loops require boost; ordinary 95 mph power cannot carry the truck over the top. An equipped auto-jump solver is optional: press J on an approach to spend one charge and add heat. Hard impacts visibly crack the roll cage. Suspension absorbs straight, aligned landings. Nose-first, sideways or roof-first impacts add one minor crack; going off the track adds three. Nine minor cracks fill the three major lifelines. Damage beyond nine breaks the truck apart and ends the race. After completing a lap, pull into the green repair bay on the right after the finish line and stop for three seconds to remove up to three minor cracks, cool the system and add one third to the boost tank, even when the cage is undamaged. Smoke thickens with each group of three cracks. One repair per lap; the timer keeps running. Driving too fast through a bend overwhelms tyre grip and slides you outward, even on banked steel. Finish all checkpoints on all three laps to set a time.

Mobile: rest each thumb on the outside DRIVE pad. Slide inward toward the centre for BOOST; slide back/down onto the full-width BRAKE/REVERSE pad. Left thumb steers left, right thumb steers right, both together go straight. Mobile steering is 30% softer than before. With both DRIVE pads held after a turn, road-heading assist eases straight over about one second. DRIVE carries for 0.2 seconds when sliding inward to boost; brake/reverse is immediate. Every mobile load offers fullscreen, and portrait also requests landscape. Tilt is optional.

Gamepad: left stick steering, right trigger throttle, left trigger brake/reverse, hold A for boost, X recovery. Ghosts never collide. No workshop ghost is supplied for the revised tracks; your first valid finish records your own.
ENGINE IDLING

TAKE A BREATH.

The race clock and ghost are paused.
CAGE DESTROYED · DID NOT FINISH

OUT OF
LIFELINES.

The nine minor-crack slots were not enough. The truck broke apart.

No finish time or ghost is saved for a wrecked run. All pit holds are three seconds; this crash ends the attempt.
PRE-RACE FRIEND CHALLENGE

YOU SEND IT.
THEY GO FIRST.

Invite a friend before you have completed the track. They set the first three-lap ghost, then you race it later. Invitation runs are private and do not unlock tracks for the invited driver.
ASYNCHRONOUS HEAD-TO-HEAD

THE CHALLENGE BOARD.

Pick a driver's three-lap run. Race their ghost now, or share your own completed run for someone to challenge later.

Casual competition, not a cheat-proof ranked service. Challenges expire after 30 days. Email addresses are never shown publicly.
THREE LAPS. STILL MOSTLY A CAR.

FINISH LINE.

0:00.000

NEXT MOVETAKE YOUR EARNINGS TO THE GARAGE

Convert banked XP to credits, buy an unlocked part and fit it before the next race.

PUT YOUR TIME ON THE LINE

Create a ghost challenge

Share a link or put your run on the board. Verify your email to be notified when a challenger finishes, with a third-person replay link.
PIT RADIO

VERIFY YOUR EMAIL.
YOUR NAME. YOUR GARAGE.

KEEP YOUR
PROGRESS.

Race as a guest, or sign in to keep unlocks and best ghosts across devices. Email sign-in now uses a normal password; email is only needed to verify a new account or reset a forgotten password.

Forgot password / older magic-link account

Send a one-time code to the account email, then choose a new password. Requests are strictly rate limited.

or
EMAIL SIGN-IN

BACK TO THE
GARAGE.
PIT RADIO / NEON OVERDRIVE

METAL.
MEET SYNTH.

Each built-in level uses a two-track playlist from /mp3trax/. A race randomly starts with track 1 or 2, then alternates between them continuously. Crash, victory, loss and results cues remain active. If no level music is installed, the adaptive soundtrack is used.

CHECKING /MP3TRAX/…

NEON OVERDRIVE · STARTS ON FIRST TAP / KEY

Both level tracks alternate until the race ends. SOUND ON/OFF (M) mutes everything. Crash retrieval restores one third of the boost tank; a normal grounded manual rollback does not. The helicopter does not repair cracks.