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Kaiju City Smash cover art
Status: LiveUpdated Nov 7, 2026

Kaiju City Smash

  • 3D
  • action
  • multiplayer
  • online
  • kaiju

Be the giant monster. Stomp, punch and tail-swipe your way through a living city, toss cars, swat helicopters and breathe a Rage Beam that slices through whole blocks. Out-wreck the AI, rampage online against a friend, or brawl with up to four players on one keyboard.

No downloads, no sign-up. It runs in your browser and saves your records on your device.

Game modes

Single player

The main event. Pick a kaiju and a city, then choose:

ModeWhat it is
Versus AIYou against 1 to 3 AI kaiju for 1 to 3 minutes. Most destruction wins. Difficulty: Easy, Normal, Hard or Kaiju.
Score AttackSolo, two minutes, beat your best. Bounty buildings and the army show up to keep things lively.
SurvivalThe army attacks in waves of helicopters and tanks. Smashing buildings heals you. How long can you last?

Online multiplayer

1v1 with a friend on another computer. One player presses Host and gets a 5-letter room code (or copies an invite link); the other types the code or opens the link. Pick your kaiju, press Ready, and the host starts the match. If someone drops out mid-match, an AI takes over their kaiju so the match can finish.

Local versus

Two to four players sharing one keyboard, each with their own keys. Great on a big screen.

Controls

Single player and online

ActionKeys
MoveW A S D or arrow keys
PunchJ (or Z)
StompK (or X)
Tail swipeL (or C)
Rage BeamSpace (or V) when the Rage meter is full
PauseEsc
Photo modeP

Local versus

PlayerMovePunch · Stomp · TailRage Beam
P1W A S DQ · E · RF
P2Arrow keys, · . · /Right Shift
P3I J K LU · O · PY
P4Numpad 8 4 5 6Numpad 7 · 9 · +Numpad 0

How scoring works

  • Toppling a building scores more the taller it is. Landmarks pay double; the bounty building under the gold beacon pays triple.
  • Chain smashes within 2.5 seconds to build a combo of up to ×3.
  • Cars, trees, street lights, helicopters and tanks score too. Punch a rival kaiju to stun it and score 100.
  • Big collapses trigger slow motion. Huge chains announce RAMPAGE! and UNSTOPPABLE!

The kaiju

KaijuStyle
BlazorThe classic fire-lizard. Balanced.
TidalonSleek sea-beast. Fastest, hits a little lighter.
VenomawSpiked swamp-brute with a big stomp.
AurumothArmoured horn-beetle. Slow but devastating.

Unlock the Obsidian, Gold Rush and Radioactive skins by earning achievements.

The cities

Neon Downtown

Neon Downtown: two kaiju brawl among glowing towers on rain-slick streets

Rain-slick streets, glowing signs and a forest of glass towers at midnight, crowned by the Sky Needle.

Sunset Harbor

Sunset Harbor: warehouses and offices by the docks at dusk

Cranes, shipping containers, warehouses and a lighthouse on the pier. Wade into the sea if you like.

Maple Suburbs

Maple Suburbs: rows of colourful houses with trees on a sunny day

Sunny streets of picket-fence houses, a duck pond, a little church and a very tall water tower.

Smokestack Works

Smokestack Works: warehouses, fuel tanks and smokestacks under a hazy sky

Factories, fuel tanks and cooling towers under a toxic sky. Barrels go boom.

Frostpeak City

Frostpeak City: snowy rooftops and pine trees beside a frozen river

A snowy old town on a frozen river with bridges to smash, a clock tower and a ring of mountains. Watch out for snowmen.

Power-ups and events

  • Full Rage: your beam is ready right now.
  • Giant Mode: grow 40% bigger with longer reach and harder hits.
  • Turbo Legs: run much faster.
  • Double Points: everything scores twice.
  • Bounty target: a gold beacon marks a building worth triple points.
  • The army arrives: helicopters strafe you mid-match. Swat them for 150 points each.

Records and extras

  • A local leaderboard for every mode and city, plus lifetime stats.
  • 12 achievements, three of which unlock skins.
  • Photo mode (P): freeze the action, orbit the camera and save a PNG.
  • A first-time How to play card, plus settings for volume, music, screen shake and a faster low-graphics mode.

How online play works

Online matches are peer-to-peer over WebRTC. The free PeerJS broker only introduces the two browsers; after that, game traffic goes directly between the two computers. The host's computer runs the match and streams it to the guest about 20 times a second, and the guest's own kaiju moves instantly on their screen, so it feels responsive. There's no game server and no account.

Some very strict networks (some offices and schools) block direct peer-to-peer connections. If you can't connect, try a home network or a phone hotspot.

Requirements

A laptop or desktop with a physical keyboard and a recent Chrome, Edge, Firefox or Safari. Phones and tablets show a friendly note instead, because the game needs a keyboard.

Good to know

Are the games free?

Yes. Every game in Play Arcade is free to play. There is nothing to buy and no account to create.

Do I need to download or install anything?

No. The games run in your web browser. Press Play and the game loads on the page.

Is my progress saved?

Yes, on your own device. Scores, levels and settings are stored in your browser, so they stay as long as you use the same browser and do not clear its data.

Who makes these games?

Karan Kharode, a software engineer from Nagpur, India. Each game is built with AI assistance and shipped by him.

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