This is a one button dueling game.

Hold to run, let go before passing to attack.

Whoever hits hardest wins.

Controls: Arrows, Z/X.

Includes a local multiplayer mode and a peer-to-peer online multiplayer mode. Note that the online mode is disabled by default. To play online, click the "Enable Online" button at the top, register an ID, and then connect to your opponent's ID. I didn't test it out that extensively, so if you run into any issues let me know!


If neither player let go before passing, it's a tie.

If one player let go before passing, that player wins.

If both players let go before passing, the winner is decided by speed.
If speeds are the same, it's a tie.

Made for #OneButtonJam with PICO-8 and Peerjs.

Rated 4.1 out of 5 stars
(22 total ratings)
GenreAction, Fighting
Made withPICO-8
Tags2D, Local multiplayer, Lo-fi, Multiplayer, one-button, one-hit-kill, PICO-8, Split Screen, Versus
Average sessionA few seconds
InputsKeyboard, Xbox controller
AccessibilityOne button
MultiplayerLocal multiplayer, Server-based networked multiplayer
Player count1 - 2
LinksSource code, Lexaloffle Entry


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Click download now to get access to the following files:

onebuttonduel.p8 59 kB
onebuttonduel.p8.png 17 kB


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OBD. Short for One Button Duel. XD.

hey bro if u online wanna play lmao

I press anter and click and press any other button. Nothing works. I can't get past the menu.


controls are the arrow keys



One person can play this

online doesn't work

Can you elaborate? The netcode's a bit buggy so online gameplay's not the greatest, but just checked and the connection broker seems to still be working fine!

(1 edit)

When I connected and we got a connection only one of us was able to select the "Online VS." button

Hmm, sounds like the connection happened before the cartridge finished GPIO setup. I'll try to find some time for a bugfix, but in the meantime if you wait a few seconds after the game has started to hit "Enable Online" you might have better luck getting it to work.

Thanks for the bug report!

Pretty fun.

Really fun game. Love the art and sound.

Love the consistent art style. This was fun to play. Well done!

This is pretty good! I could see my self playing this with friends!