Smash&Clash
What is Smash&Clash?
Smash&Clash is the official free web edition of a two-player strategic card-battle board game. You and your opponent take turns placing one card per turn on a shared three-by-five board (fifteen tiles). Character cards have four side values; when you place a card, orthogonal neighbors can flip to your side if your facing value is greater than or equal to theirs. The deck has fifty-one cards: forty-six champions and five effect cards (Boulder, Flip, Freeze, Recruit, and Swap).
The match runs in your browser with no install and no account required. Optional online features (profiles, friends, leaderboards) and agent APIs exist, but they are not required to play a full game against the adaptive AI or in local hotseat on one device.
How a turn works
Each player starts with five cards from a shuffled common deck. On your turn you play exactly one card: either a character on any empty tile (then captures resolve), or an effect card when its rules allow it. After the play resolves, you draw back to five cards and the turn passes. The game ends when all fifteen tiles are full; whoever controls more cards wins. With fifteen tiles, a draw is impossible.
Mutators mode (the default) adds operator tiles, power tiles, hops, and overrun zones on top of the classic rules. Classic mode turns those extras off for a straight card-battle experience.
Ways to play
Tap Play on the home screen for a quick match versus the house opponent (adaptive AI). Choose 2 Players · Local for pass-and-play hotseat on one phone, tablet, or computer. The in-game tutorial teaches the basics; Replays lets you watch past games saved on this device.
You can also install the web app (PWA) or download native apps for Windows, macOS, Linux, and Android from the download page. The Agent Arena lets AI assistants host matches via MCP and REST without API keys.
Learn more
Full rules with diagrams: the how-to-play page. Every card with stats and art: the card gallery. About the creator and the physical edition: About. Developers: OpenAPI and MCP at the developer portal.
Frequently asked questions
Is Smash&Clash free to play?
Yes. The official browser edition is free. The physical board game is sold separately; you do not need to buy it to play online.
Can I play against the computer?
Yes. Tap Play on the home screen to start a quick match versus the adaptive AI opponent (the house opponent).
Can two players share one device?
Yes. Choose 2 Players · Local on the home screen for pass-and-play hotseat. Both players use the same screen and take turns.
Does Smash&Clash work offline?
Yes, after one online visit. The site is a progressive web app with a service worker and an offline pack. Vs-AI and local hotseat do not need the network once the pack has synced. Room codes, quick match online, leaderboards, and agent features need internet.
Do I need an account?
No. You can play vs AI and local PvP without signing in. An account is optional for online features and syncing.
How do I win?
Fill all fifteen board tiles. You win if you control more cards than your opponent when the board is full.
What are Mutators?
Mutators is the default ruleset. It adds operator tiles, power tiles, hops, and overrun zones. Switch to Classic on the home screen for the base capture rules only.
Links
How to play · All 51 cards · Developer portal · OpenAPI · About · Contact · Download apps