Built my first game with pico8 and it was super fun! I followed this tutorial for ~30 minutes and then tweaked it.

I was able to add a title screen, horizontal raindrops, sprite switching, poison switching and movement all around in just an hour :)

It'll be fun to host a small game jam at my school with pico8!

Untitled

by jajoosam

Cart #51450 | 2018-04-09 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

OctoPico Beta

by nate2squared

Cart #51423 | 2018-04-08 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

This is a playable game concept from my step-daughter Corinne.

Guide the octopus through the caverns, avoiding the edges, collecting fish, and eliminating creatures with your laser.

Each level gets a little faster. Compete for the highest score.

Beta: The creature cavern avoidance needs more finesse, and I'd be open to any suggestions about that or any other improvements.

AdVenture Game Creator

by MrBigaston

Cart #51409 | 2018-04-08 | Code ▽ | Embed ▽ | No License

3

Hey! Do you know with the video games industry you can earnd lot of money? Do you want some money? So, why do not made games?

To Publish a game, you need first Combine one Art point and one Developpement point. To create this point, click on the big square button on the left. When the progress bar is finish, you earn some points. You can upgrade you progress speed with the Plus button at the left. And if you want to upgrade your productivity, you can change the upgrade type and click again on the Plus button.

This game was create for the Meta Game Jam (https://itch.io/jam/metagamejam), with a mix between a parody of AdVenture Capitalist and Game Developement.

[ Continue Reading.. ]

Here's a repo with the code and more details on GitHub

PICO-8 has a GPIO interface supporting 128 pins, each of which can store a 128-bit unsigned integer (0-255). However Raspberry PI and CHIP only support consuming each GPIO pin as a single bit (0 or 255), and only have pins for a small subset of the 128 virtual slots. The Pocket CHIP only has 6 fully-exposed pins (indices 2-7).

This means that if you want to pass GPIO information that can be used easily with any platform that runs PICO-8, you only get six on-and-off slots, which doesn't sound that great. Until you consider that you can still use those 6 slots to encode an integer up to 6 bits (-32 to 31 signed, or 0 to 63 unsigned!). Even a 3-bit int (0-7 unsigned) can often be enough to encode meaningful state information for many games, which can be used to trigger vibrations, color lights, etc.

The trouble is, taking a decimal value and encoding it as binary with PICO-8's built-in GPIO functions, then reading it again later, is not simple. PICO-8 Messenger provides utility functions which abstract away the bit-shifting and let you just read and write numbers.

Usage

Copy the functions you need from pico8-messenger.lua into your .p8 file.

-- included definition for write_gpio
-- included definition for read_gpio

-- write the number -1 to bits 2 through 4
write_gpio(-1, 2, 3)

-- print out the number stored in bits 5 through 7
print(read_gpio(5, 3), 8, 8, 7)

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I'm wondering if there are any community-established methods for profiling performance of a PICO-8 program. It's come to my attention that a game I'm working on lags substantially on less-new hardware and I'd like to have some way of profiling which functions are taking the longest to run, so I don't waste my time optimizing the wrong parts of the program.

Any tips? Thanks! :)

so i have a function where the enemies have enemy1.isalive = true enemy2.isalive = false so i got that system working so how can i check to see if all enemy1.isalive are false (BY the way all enemies are in a group called enemy = {} i add every one of them sorry for no snippets)

　　　　　　　･ ｡
　　　　　　　 ☆∴｡　
　　　　　　　　･ﾟ｡★･ﾟ｡･
　　　　　　　　　･ ﾟ｡　　
　　　　　　　　 ･ ﾟ｡･ﾟ｡ ﾟ｡･ﾟ★｡
　　　　　　　　　　☆ﾟ･｡°. ﾟ　☆ﾟ･
　　　　　　　 　　ﾟ｡·･｡ ﾟ　ﾟ｡·･｡ ﾟ
　　　　　　　　　　ﾟ .｡☆｡★　･ *.｡☆｡★　･

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Scaled-sprite voxel renderer 0.1

by triplefox

Cart #51359 | 2018-04-06 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

What it is and does:

• 3D single-point camera(pan and zoom, no rotation)
• Sorted draw of "scubes" (small cubes/sprite cubes) and "lcubes" (large cubes, collections of scubes - but they could be any shape)
• Generates voxel data from the cart's sprite map! It works by combining a texture map, a depth map, and an address into the texture data to generate scubes. Then some additional post-processing allows the scubes to be transformed opening possibilities for procedural terrain etc.

I'm not sure how much further I'll go in developing this one because the game I'm making needs something a little more suited to crisp, accurate walls and corridors and I ended up with this after iterating through polygonal voxel cubes first and finding that this technique could approximate that result with far fewer tokens. So I cleaned it up a bit and started thinking about how to make it do things more like old Sega games(Space Harrier, Outrun, Power Drift, Galaxy Force), but the asset pipeline isn't quite as complete as I want yet - so if you want to step in, please go ahead. This probably won't be my focus for a while.

I want to share a game that is WIP to a friend that does not have Pico8 emulator.
I'd love to upload them here and be able to give a non-indexed link to a friend, so he can play with a browser, but I only see the option to upload and play the game from website if it's posted publicly on the forum.

Dropbox and Drive dropped support to serve html.

What's a best and easiest way to sahre a game to a friend so that he only has to click a link and play from browser, while not being totally public?

Hi

I'm trying to make certain modifier activate when an Actor(monster) collided with a bullet.

The monster modifier was defined like the following:
Some->Obj_id(bullet's id)->collide->side.

But when the bullet collided it didn't work.

Is that a bug? is there any workaround for this?

thank you.

Blackout 1.0

by Bibiki

Cart #51336 | 2018-04-05 | Code ▽ | Embed ▽ | No License

2

Sinopsis

Blackout is a game with a simple core mechanic. You cannot see. You will have to pick up some items around, but you will have to do it only with the help of the sounds around.

Gameplay

Use the arrow keys to move.
Press "X" to pick up the item. You will only pick up the item when you are above it.

About

My name is "Bibiki". I'm a composer/sound designer interested also in learning programming and game design, so pico8 is an awesome tool for learning. This is my second attempt to make a pico8 game, and even though the mechanic is simple, I feel very happy about a game done with a sound mechanic.

If you want, you can follow more of my stuff in twitter: @BibikiGL

Also, thank you very much to @egordorichev for making this awesome menu!

Any feedback is welcome :)

Hi

I am making a ninja game now.

I need a really cool background music. I tried to use music editor with PICO-8 but I don't I have any sense of creating

a cool music. Creating a music was really simple, but create a good or cool music is a different thing which requires

talent of creating music which is totally unrelated with coding.

That's why I am looking for a cool music which is allowed to use free.

I tried to google "pico-8 free music" "free song pico-8" but found nothing.

Little Menu Engine Demo

by Astorek86

Cart #51325 | 2018-04-05 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

Hello,
Just programmed a simple "Menu Manager" and I thought, it can be useful for others. :)

It presents a way to write your own Menu, moving a cursor with Arrow-Keys (Up/Down), select an Entry (X) and call a Function.

The Sourcecode is well documented.

EXAMPLE

menu={}

function menu.update() --Copy from Cartridge
function menu.draw() --Copy from Cartridge

function _update()
 menu.update()
end

function _draw()
 menu.draw()
end

function entry_one()
 cls()
 print("entry one selected!")
end

function entry_two()
 cls()
 print("entry two selected!")
end

function entry_x()
 cls()
 print("entry x selected!")
end

cls()
menu.entries = {
 "text entry one", entry_one,
 "text entry two", entry_two,
 "text entry x", entry_x}
cursor(26,40)
menu.start()

[ Continue Reading.. ]

The fact you can read and write PICO-8 GPIO values from the web wrapper is awesome - it means you can do things like emit vibrations according to game state, change the site theme to match different in-game levels, or maybe even develop a brand new input scheme.

However the API for reading these values is a bit basic... PICO-8 writes GPIO values to an array, and it's up to you, the developer to check those values periodically to see if they're different. What if you could just tell JavaScript to let you know whenever the GPIO pins get updated with new values?

Voilà:

var gpio = getP8Gpio();
var unsubscribe = gpio.subscribe(function(indices) {
  console.log(
    'New values at indices ' + indices.join(', ') + ': ' +
    indices.map(function(i) { return gpio[i]; }).join(', ')
  );
});
// unsubscribe later if you want...
unsubscribe();

This uses JavaScript setters under the hood to watch each index in the array, which means the watching part is shoved into a native background thread (== faster!). No need to write once-a-frame JS iterator loops or anything like that. Whenever PICO-8 writes to the GPIO array, you get notified immediately.

Of course you can also write back to the GPIO array:

gpio[3] = 255;
gpio[4] = 0;

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Any pico-8 game I play (my own or downloaded) seems to have some noticeable input lag in the standalone client (a delay between when a key is pressed and when the game responds). This doesn't happen with other games on my computer, so I know it's not a video delay issue. Is this an issue that anyone else has noticed, and if so is there a fix for it?

I want my web export to support mobile. But if you're like me, you might find the API for controlling touch button inputs from a web page a bit esoteric, and not super easy to read/write. Why not write a tiny API wrapper that makes this much easier?

If you have a page that looks like this:

<!-- ... cart stuff -->
<button id="left"> < </button>
<button id="right"> > </button>
<button id="up"> /\ </button>
<button id="down"> \/ </button>
<button id="o"> O </button>
<button id="x"> X </button>
<! -- ... -->

Include this in your page...

(function() {
  var __btns = {};

  function update_btns(playerIndex) {
    pico8_buttons[playerIndex] =
      Object.keys(__btns[playerIndex]).reduce(function(val, btn) {
        return val | (__btns[playerIndex][btn] ? Math.pow(2, btn) : 0);
      }, 0);
  }

  function registerP8Btn(domElement, btnIndex, playerIndex) {
    playerIndex = playerIndex || 0;
    window.pico8_buttons = window.pico8_buttons || [];
    pico8_buttons[playerIndex] = pico8_buttons[playerIndex] || 0;
    __btns[playerIndex] = __btns[playerIndex] || {};
    domElement.addEventListener('touchstart', function() {
      __btns[playerIndex][btnIndex] = true;
      update_btns(playerIndex);
    });
    domElement.addEventListener('touchend', function() {
      __btns[playerIndex][btnIndex] = false;
      update_btns(playerIndex);
    });
  }

  window.registerP8Btn = registerP8Btn;
})();

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This is sort of out of left field, but I think it would be really neat to have built-in vibration support - specifically for use in mobile web browsers which support the web vibration API.

That might have limited application in general, but in any case I'd love to be able to hack this in for my own game. I'm checking out the possibility of using dset() in the game in combination with reading the indexedDB storage in the web browser to pass messages from Lua land to JavaScript land, which could trigger different types of vibrations depending on game state.

My main trouble right now is that I'm having trouble parsing the information stored in IndexedDB ... it's pretty esoteric. It might be some kind of binary format I don't understand.