Js13kGames is a JavaScript coding competition for HTML5 Game Developers . The fun part of the compo is the file size limit set to 13 kilobytes . The competition started at 13:00 CEST, 13th August and ended at 13:00 CEST, 13th September 2018 . Theme for 2018 was: offline . Read GitHub's tips and tricks article, check the Resources for tools, read the Blog , and subscribe to the Newsletter - good luck and have fun !

I'm running this competition on my own in my free time. I usually acquire prizes worth more than 20.000 USD and send special js13kGames t-shirts to the participants for free . With gadgets and stickers, every single year, with free shipping . To help me keep it all going you can send a few bucks via the PayPal button below, thank you !

Share the love for HTML5 games and support the js13kGames competition! See the Contact section for more details on how to get in touch.

Co-founder and owner of Jscrambler where he co-leads business development, and supervises all R&D and technical activities. Inventor and co-author of three patents in the Computer Security area. Holds a degree and a MSc in Computer Science. Speaker at several IT events, related with Security and JavaScript.

Youtuber ⁄ Graphic Designer who shares & reviews a variety of different games - everything from Indie Gems to AAA titles. A veteran of numerous game jams, he's featured & given feedback on entries in everything from the 7DFPS Jam to Ludum Dare 29.

Maciej Szpyra, Michał Nykiel, Paweł Skierczyński and Victor Debone. Developers during the day, gamers during the night. At Spartez , our personal passion for games was big enough that we needed to bring more team members to the jury, and we are ready to play all the games coming from 2018 developers 🕹🕹🕹 with some expectations from multiplayer games.

Christof Wegmann is founder and CTO of Exit Games and develops the realtime, multiplayer, cross-platform product "Photon". Photon is used by more than 300,000 game developers - including companies like Square Enix, Ubisoft, Disney, Warner Bro, SEGA, Miniclip, Codemasters, Glu, Rilisoft or World Golf Tour. The high performance Photon Server and Photon Cloud allow cross-platform gaming between Mobile, PC, Console, Web, VR/AR and other popular devices.

Game developer and founder of Zenva . Since 2012, Pablo has been teaching online how to create games, apps and websites to over 200,000 students through Zenva Academy , and created content for companies such as Amazon and Intel.

Mike is an AI researcher, game developer and science writer. He's the creator of the game-designing AI ANGELINA (who also entered a game jam once), the founder and co-organiser the Procedural Generation Jam , and the developer of games like Rogue Process (which started life in a game jam!).

For over 20 years Josh Marinacci has worked as developer advocate, UX designer, researcher, engineer, and Twitch streamer . He has worked at such storied companies as Palm, HP, Nokia, Sun, and Mozilla. He is currently the Senior Developer Advocate for Mixed Reality at Mozilla. Josh believes in the power of technology thoughtfully applied, and the need for better human computer interfaces.

Graphic Designer, mom and wife. Open source and mobile games enthusiast. Making game designs for Enclave Games , t-shirt designs for js13kGames , writing inspirational posts on Tutsy , and making cool things for children at MAMAdesigner . Love taking photos , drawing icons and spending time with her family.

YouTuber & writer of Indie Games, lover of Game Jams, Co-host of IndieGameJams.com . Aiming to be the Queen of Indie Games. Also enjoys going outside from time to time and taking pictures.

There are four different categories , you can submit your game to any of them - it's up to you. There's a special page for everything about the new WebXR category if you want to know more.

Rules

Package size below 13 kB All your code and game assets should be smaller than or equal to 13 kilobytes (that's exactly 13,312 bytes, because of 13 x 1024) when zipped. Your .zip package should contain index.html file and when unzipped should work in the browser. Don't overcomplicate building the zip package, it should unpack on any platform without problems. You can use tools that minify JavaScript source code.

Two sources - readable and compressed The competition is focusing on the package size, but learning from others is also very important. Please provide two sources of your game - first one should be minified and zipped to fit in the 13 kB limit (sent via the form) and the second one should be in a readable form with descriptive variable names and comments (hosted on GitHub).

No external libraries or services You can't use any libraries, images or data files hosted on server or services that provide any type of data - for example Google Fonts are not permitted (although you are allowed to ask users to live-load a web font to support some characters or emoji on devices that can't display them properly, but you have to make sure your game will work without them). Your game should work offline (Desktop and Mobile categories) and all the game assets should fit in the package size limit (not counting WebXR's A-Frame and Babylon.js frameworks). If you manage to shrink your favorite library below 13 kilobytes including the code itself, then you can use whatever you want, just remember about the 13 kB limit.

Main theme Main theme for the competition is "offline". It's highly advised to follow it in your game, because the judges will pay attention to that, but you can freely interpret the theme and implement it however you feel would be the best.

Deadline - 13th September 2018 The competition starts at 13:00 CEST, 13th August 2018 and ends at 13:00 CEST, 13th September 2018. No submissions will be accepted after the end of the competition.

Licensing You have to have the rights for every asset used in your game. Remember that the submitted games will be published and made available for everybody to see.

New content only Do not submit any old games or demos - you have a whole month to work on something new and fresh, this should be more than enough. Also, submitting Breakout or Flappy Bird clones taken out of a tutorial make no sense at all - try creating something at least a little bit more original.

Errors and browser support Your game must work and be playable in at least two browsers: latest Firefox and Chrome, but the more supported browsers, the better. There should be no errors - you can lose some points if your game is showing any errors in the console. If we cannot play your game, it won't be accepted.

Teams It doesn't matter if you're working alone or with your friends, just remember that the number of prizes is fixed, so you'll have to share your trophies with your teammates.

Sending submissions There's a special form to submit your game. Please remember that you have to provide two sources (see the Rule #2 for details) - a link to a public repository on Github and a zipped package. Participants are allowed to submit more than one game in the competition, though sending the same game as independent submissions targeting different platforms (for example separate builds for desktop and mobile) is forbidden.

Accepting submissions Submissions will be checked manually and published after positive verification. This may take up to a couple of days, so be patient if your game is not yet online. I claim the right to reject any submission without giving a reason, although I hope I don't have to. I also have the right to update the rules of the competition at any time.

Time frames for voting, judging and announcing winners The Community Awards voting among the participants will last for a week between September 13th and 20th, winners will be announced on September 21st. Judges will vote for the games during the three week period after the submission time ends: from September 13th till October 4th, winners will be announced on October 5th.

Server category specific rules All the Server category rules, the sandbox server and the demo code can be found at github.com/js13kGames/js13kserver.

Code of conduct All participants and judges at js13kGames are required to agree with the following code of conduct. Organizers will enforce this code throughout the online event. We are expecting cooperation from all participants to help ensuring a safe environment for everybody. Js13kGames is dedicated to providing a harassment-free competition experience for everyone, regardless of gender, sexual orientation, disability, physical appearance, body size, race, or religion. We do not tolerate harassment of competition participants in any form. Competition participants violating these rules may be sanctioned or expelled from the competition at the discretion of the competition organizers. TL;DR: Be excellent to each other.

Privacy policy By entering your email address and sending a game through the submit form you agree to receive email communication about important events of the competition like announcing the winners or sending out the digital prizes, but also curated content from the partners about their tools, services, or job offers. I will never share your email with anyone though.