What is js13kGames?
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!
Hi, I'm Andrzej
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 top 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!
Check out the winners!
Share the love for HTML5 games and support the js13kGames competition!
See the Contact section for more details on how to get in touch.
Product Owner and Board Member of the Defold Foundation, overseeing development of the free and source available Defold game engine. Worked with mobile game development since before the smart phones. Loves old school games and roguelike games (hosts the Rogue Basin wiki). Strong believer in the power of open source development with more than 150 open source projects on GitHub.
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. Formerly of Mozilla Mixed Reality team, currently looking for new XR related employment. Josh believes in the power of technology thoughtfully applied, and the need for better human computer interfaces.
Pablo Farías Navarro
Certified game developer and Founder of ZENVA - the world's leading platform to learn game making, VR, data science and full-stack programming. Since 2012, Pablo has been developing professional-grade courses that have helped over 500,000 learn to code and make games.
Joep van Duinen
Joep leads the creator team at Poki, the number #1 platform for play on web. Poki' on a mission to create the ultimate online playground: a place where kids of all ages and game developers come together to play and create. Reaching more than 30M monthly active users worldwide Poki is market leader on web.
They help a growing 300+ game developer community - including Kiloo (Subway Surfers), Hipster Whale (Crossy Road) and Colin Lane (Dunkers) to achieve success on web. Here's more information about how creators can get their html5 games featured on Poki.
Maciej Szpyra, Paweł Skierczyński and Victor Debone. Developers during the day, gamers during the night. At Spartez, our personal passion for games is big enough that we bring a team to the jury. We are ready to play the games coming from 2020 developers 🕹🕹🕹
Nathan is a Software Engineer at Coil who considers himself a gamer first and an engineer second. He's been working with and on applications using Web Monetization for the past year, and is eager to see the intersections between Web Monetization and game design this year!
Partner Engineer at Facebook since 2017, working mainly on the Instant Games platform. I am a movie and video game addict, secretly dreaming of becoming a movie director. I joined and co-organized quite a few game jams (Global Game Jam in Singapore in 2018, 2019 and 2020, etc.). I am always excited to see how talented developers manage to make gems from constraints.
Technical Product Owner of the Casual Group at Azerion. Oversaw and maintained the creation of hundreds of HTML5 games, currently focusing on Azerion's popular mobile Casual IP's such as Operate Now, Troll Face Quest, Bob the Robber and Dynamons. Enjoys everything Pokemon and Final Fantasy.
Yuriy is a founder of Puma Browser – mobile browser focused on seamless payments and data privacy. Previously worked at Lyft, Facebook, Meteor, Cloudant and a few startups as Developer Advocate ⁄ Engineer. Grew up in 🇺🇦🇯🇵🇨🇦. Lives in SF now, enjoys tennis, moto rides, park walks and games.
Founder of Quantum Flytrap - a quantum lab right in your browser. A deep learning specialist with a Ph.D. in quantum physics (from ICFO, Castelldefels). Piotr works on AI for content design and physics engine optimization in ECC Games, and develops Quantum Game with Photons - an open-source in-browser game with real quantum mechanics. He has a passion for interactive data visualizations, explorable explanations. Piotr blogs about data science, programming, quantum physics, games, and... dating.
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 and tutorials on Tutsy and making cool things for children at MAMAdesigner. Loves taking photos, drawing icons, and spending time with her family.
Michelle is a Content Producer in the realms of innovation and technology. Known as the “Hackathon Queen” 👑 you'll often find her on stage MC’ing or speaking on a range of topics from artificial intelligence, to business, community engagement, the future of work, and esports. With a background in both science and arts, Michelle has a passion for gaming and combines this with her experience in a range of industries. Michelle brings a unique insight into gaming and is a gaming journalist and Twitch Streamer too!
1st place Ninja vs EVILCORP by Rémi Vansteelandt
2nd place Edge Not Found by Tom Hermans
3rd place CHOCH by kostik1337 & lampysprites
4th place Track not found?! by xem
5th place Stolen Sword by Ian Chiao
6th place The Last Spartan by Michael Ferron
7th place FOURFOLD by Saud
8th place I want to google the game by Mark Vasilkov
9th place Highway 404 by Jerome Lecomte
10th place MINIPUNK by Cody Ebberson
11th place Searching for 04 by Nicklas Löf / Snukey
12th place Johnny Smiter III by Paul Brunt
13th place Island Not Found by Ben & Salvatore
14th place You have found by Mark Knol
15th place 404kph by jaburns
16th place WIZARD WITH A SHOTGUN by Elliot Nelson
17th place Connection by Federico Tibaldo
18th place Sojuz 404 by Markus Fisch
19th place Symmetry Not Found by sirxemic
20th place NoteCraft by KilledByAPixel
- 21. Big Champ by Bryan Perfetto
- 22. The Legend of Yeti-404 by Richard Munn
- 23. RESCUE not FOUND by David Brad
- 24. 404 : Road Not Found by Ganesh Prasad / GnsP
- 25. The King's Missing Page by Lance Ewing
- 26. Oh no! All the textures are 404! by piesku
- 27. Another Day at the Website Factory by razh
- 28. Heaven Ascent by Katherine Stark
- 29. Roll Tanks by David Durham
- 30. And then it was gone by Sebastian Dorn
- 31-40. Byte! Deliver Yourself, OS13k, Big Movie Hacker, OFFICE 404!, 404 BC Pinball, Raid Area 404, fyranollfyra, Barry The Bird, 4O4, Elementary Challenges
- 51-60. You've Bot Mail, In To Net Cafe, Shooty Alien Game, Lost Vision, 404 MISSION, Controls NOT FOUND, The Waffle, La Once, Magik - 404, The Unseen Network
- 61-70. Bio-Server, NILO, Coler, 404 Box, Four, oh Four..., robots.txt, Try to be Not Found, Realm 404, P4ck3t, Forgetful God
- 71-80. the internet is broken (again), Find the Papers, Clone not found, Shooooooot!!, Asteroid 404, Not Found, Cardice, Employee Not Found, The Machine, Soul Not Found
- 81-90. 404 Repetitions, Universe Not Found, Planet 404, Music Memory, Signal Decay, 40Fighter, Status Code, Sniff your Game, HTTP Runner, Loot Not Found
- 91-100. Feathers Not Found, Coding Golf - Broken Links, Raccoon Transport 404, Finding Paige, Players not found, 404 Princess, track 404, Dewdrop Farm, V-13K, 404 SECONDS
- 101-110. House Not Found, ZigClimb Reborn, Jam Champs: 404 Princess Not Found, Kill.exe Not Found, Find All Pages, Planet 404 that is yet to be found, Adopt-a-Fire, BOXBOXBOXBOXBOX, Vote by Mail: Funding Not Found, Digicrush
- 111-120. Planet Not Found, sam's js13k game, 404 laundry not found, Go Go Programming Dystopia, Four or FOUR, 404 Exit Not Found, POPULATION: 404, HTTP-HERO, The Colorful Journey, Hotel 404
- 121-130. electron life simulator, Lost Pages, Exit Not Found, Galactic Communications inc., The Book of Pages Not Found, MegaFauna Not Found!, A0A, Car block 404, For O'Foughr, Lost In Space. Endless Destruction.
- 131-140. Browser 404, Knights Quest, Can't find the page, !Found, Delete!, Beats Not Found, Going Home, The last Link, Lost and alone finding stuff, killing (laafsk), 404
- 141-150. Dive and Pick, Inter Planetary Internet, BombRoll, Req N' Res, They will NOT FOUND me, ET Escape, Never Found, Asteroids, Information Super Highway 404, Request & Response
- 151-160. M.Y.H.E.R.O., Can You Fix My Server?, Flour Oh! Flour, Red Billion, Friend of the Fallen, CosmoColonies, Black Jack 404, Tangletruck, 404!! Lost treasure, Gears Not Found
- 161-170. Found bomb ?, Doors, Raiders of the Lost Page, Find the theme, ::FRIENDS NOT FOUND::, Teapot Not Found Poker, FX404Seconds, Frog Jumper, Boat racing 404, WinWin
- 171-180. Logic Shooter, Space Shooter, League of Heroes, ROR, Time of enjoy, Robot Mission 404, Bolos The Dog, FileNotFound, Planetary — an starship fight game, mastermind
- 181-190. Olympic Hide & Seek Retrospective: Atlanta 1996, Find an Exit, Packet Jumpr, Stolen Happiness, Tetris 404, 404! MissingPage, Asteroids404, 404 soccer, Bard's Fantasy, 404 Orbiting Asteroids
- 191-200. MVLM, Code-Farm, 404ms, Arkanoid 404, Setlerio, Lost in Funland, Emoji Memory, 404: Search For The Missing Pages, Village Not Found - 404 to 200, 404 FlappingBird
Winners - Mobile
1st place Ninja vs EVILCORP by Rémi Vansteelandt
2nd place Stolen Sword by Ian Chiao
3rd place Track not found?! by Xem
4th place FOURFOLD by Saud
5th place I want to google the game by Mark Vasilkov
6th place Highway 404 by Jerome Lecomte
7th place Johnny Smiter III by Paul Brunt
8th place Connection by Federico Tibaldo
9th place You have found by Mark Knol
10th place Big Champ by Bryan Perfetto
- 11. Sojuz 404 by Markus Fisch
- 12. Symmetry Not Found by Sirxemic
- 13. RESCUE not FOUND by David Brad
- 14. The King's Missing Page by Lance Ewing
- 15. Roll Tanks by David Durham
- 16. OFFICE 404! by Tricsi
- 17. Barry The Bird by Marco Fernandes
- 18. Big Movie Hacker by Daniel Cohen
- 19. 4O4 by Danny van Geel
- 20. fyranollfyra by Niklas Berg
Winners - Web Monetization
1st place Ninja vs EVILCORP by Rémi Vansteelandt
2nd place OFFICE 404! by Tricsi
3rd place Symmetry Not Found by Sirxemic
4th place RESCUE not FOUND by David Brad
5th place Johnny Smiter III by Paul Brunt
- 6. The Legend of Yeti-404 by Richard Munn
- 7. Track not found?! by Xem
- 8. Big Movie Hacker by Daniel Cohen
- 9. Ned Snow by Juankz
- 10. Universe Not Found by Cameron Manavian
Winners - WebXR
1st place Exit by James
2nd place 13kb-404 by mrdoob
3rd place Ned Snow by Juankz
4th place An HTTP Story by Kai Zau
5th place ROAR by Staś Małolepszy (piesku.com)
- 6. Keep'em 404 by Sorskoot
- 7. Server Rider VR by Donitz
- 8. Sculpting Done Quick by Alex Swan
- 9. Human Not Found by Randy Tayler
- 10. Every Alien Loves 404 by Yumao & Ovilia
- 11. Area 404 - signal not found by Rene Hangstrup Møller
- 12. Find Matt by Eric Ros
- 13. Flow of Four by Andras
- 14. FIND THE LOST CROSS! by Sándor Burian
- 15. Manquant by Computer Guy
Winners - Server
1st place Players not found by Dunin
2nd place For O'Foughr by Lopis
3rd place Knights Quest by Zack Urben
4th place The last Link by Jorge Rubiano
5th place FX404Seconds by DarknessFX
- 6. Boat racing 404 by Christian Paul
- 7. League of Heroes by KeithKarnage
- 8. Planetary — an starship fight game by Aurium
- 9. Emoji Memory by Daniel Jeffery
- 10. The colourful board by Rituraj
Super Special is an appreciation of a given entry that was original,
unique and stood up from the others - handpicked by Andrzej Mazur.
OS13k is being awarded for the concept of managing trophies from other games,
ROAR for doing a WebXR entry in 13kb without any libraries.
115 × js13k 2020 t-shirt
One hundred js13kGames 2020 t-shirts (plus fifteen in the WebXR category) shipped worldwide for free.
1 × Nintendo Switch
One Nintendo Switch gaming console, as part of the Web Monetization category.
10 × PlayCanvas account
Ten PlayCanvas Personal plans offering a cloud-hosted, collaborative platform for building games, for 12 months each.
13 × GitHub account
Thirteen paid GitHub Pro plans - advanced tools for your private repositories for 12 months each.
3 × CodePen Pro account
Three CodePen Pro Starter accounts for 12 months each.
5 × SitePoint Premium subscription
Five SitePoint Premium subscriptions for 12 months each.
1 × Proto.io account
One Proto.io account with Startup plan for 12 months.
One $500 devtodev services credit, and free usage of the platform to all participants for 3 months each.
4 × Zenva Academy account
Four coupons for the access to the entire catalog of courses on Zenva Academy.
5 × NodeBB hosting
Five Hamlet hosting plans for 12 months each from the NodeBB team.
20 × Build Arcade Games with Phaser 3 course
Twenty courses combined into Super Combo Pack 1 – Build Arcade Games with Phaser 3 from Jared York.
Exclusive coverage of your game on GameDistribution, including exclusive-homepage promo spots.
There are five different categories, you can submit your game to any of them - it's up to you.
There are special pages for Web Monetization and WebXR categories if you want to know more.
Full power of the hardware.
Handheld touch devices.
The first three categories (Desktop, Mobile, and Server) are voted by participants themselves separately,
while WebXR and Web Monetization results will be judged by the experts.
Desktop category (overall)
Top 100 games
- 1st place: DevToDev, CodePen, SpriteStack, Kendo UI, Aseprite, WOWSound, Danger Crew, GitHub + Questocat, CSS Battle, js13kGames t-shirt + pen
- 2nd-3rd places: CodePen, SpriteStack, Kendo UI, Aseprite, WOWSound, Danger Crew, GitHub + Questocat, CSS Battle, js13kGames t-shirt + pen
- 4th-5th places: SpriteStack, Kendo UI, Aseprite, WOWSound, Danger Crew, GitHub + Questocat, CSS Battle, js13kGames t-shirt + pen
- 6th-13th places: Danger Crew, GitHub + Questocat, js13kGames t-shirt + pen
- 14th-100th places: js13kGames t-shirt + pen
Top 20 games
- 1st place: GameDistribution, Construct 3, WebStorm, SitePoint, Phaser Editor, Build Arcade Games
- 2nd-3rd places: Construct 3, WebStorm, SitePoint, Phaser Editor, Build Arcade Games
- 4th place: WebStorm, SitePoint, Phaser Editor, Build Arcade Games
- 5th place: SitePoint, Phaser Editor, Build Arcade Games
- 6th-13th places: Phaser Editor, Build Arcade Games
- 14th-20th places: Build Arcade Games
Top 5 games
- 1st-4th places: NodeBB, Zenva Academy, CryPixels
- 5th place: NodeBB, CryPixels
Web Monetization category
Top 15 games
- 1st place: Nintendo Switch, Proto.io, Making Money with HTML5, Pyxel Edit, Coil membership
- 2nd-5th places: Making Money with HTML5, Pyxel Edit, Coil membership
- 6th-15th places: Pyxel Edit, Coil membership
- 16th-all places: Coil membership
Top 15 games
- 1st place: Magic Leap, WebStorm, PlayCanvas, js13k t-shirt + pen
- 2nd-5th places: WebStorm, PlayCanvas, js13k t-shirt + pen
- 6th-10th places: PlayCanvas, js13k t-shirt + pen
- 11th-15th places: js13k t-shirt + pen
Package size below 13 kB
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). Analytics and other stat-collecting scripts are also not allowed. All the game assets should fit in the package size limit (the A-Frame, Babylon.js, and Three.js frameworks are not counted towards the size limit, but you can use them only in the WebXR category). 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 for the competition is announced on August 13th. 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 2020
The competition starts at 13:00 CEST, 13th August 2020 and ends at 13:00 CEST, 13th September 2020. No submissions will be accepted after the end of the competition, although there may be exceptions to that.
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. On the other hand, you have the right to report any game publisher that will link to (or iframe) your entry on their portal without your permission.
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. You can, however, use any available libraries and resources that are not yours, but you have the right to use them.
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.
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.
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.
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, giving feedback, and announcing winners
The voting among the participants will last for three weeks between September 14th and October 4th, winners will be announced on October 5th. Experts will give the games constructive feedback (one per game) during the same three week period - their comments will also be published on October 5th.
Save data ⁄ persistent memory
Remember to add prefix to your variables and create a namespace for your game when you save data to
localStorage as all the games on the server share the same memory when played in the browser. Also, be sure to NOT use
localStorage.clear() as it will wipe out all the data of all the other games. Manipulate the data you are sure is yours.
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. For more details see Berlin Code of Conduct.
The following terms apply to participation in this competition ("Competition"). Entrants may create original solutions, prototypes, datasets, scripts, or other content, materials, discoveries or inventions (a “Submission”). The Competition is organized by the Competition Organizer. Entrants retain ownership of all intellectual and industrial property rights (including moral rights) in and to Submissions.
As a condition of submission, Entrant grants the Competition Organizer, its subsidiaries, agents and partner companies, a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to use, reproduce, adapt, modify, publish, distribute, publicly perform, create a derivative work from, and publicly display the Submission.
Entrants provide submissions on an "as is" basis, without warranties or conditions of any kind, either express or implied, including, without limitation, any warranties or conditions of title, non-infringement, merchantability, or fitness for a particular purpose.
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.
By submitting, you also grant the competition organizers the right to re-use the uploaded materials for advertisement of the competition in any form.
Frequently Asked Questions
- Why exactly 13 kB?
- Well... why not? :)
- What's in it for you? Are you getting paid?
- Nope, it's just my own idea and it's made for pure fun. I'd love to get a sponsorship though as I spent my own private money on the first edition to cover making t-shirts, shipping of the prizes worldwide, etc.
- What does the "zipped" term exactly mean?
- Sent package should be zipped with your usual system archiver, the only allowed extension is .zip. Let's keep it simple - it's a competition for coders and this should be your main focus, the code itself. Thanks to the zipped archive you will easily send your game and we will easily check the file size.
- Can I use Flash?
- Can I use WebGL?
- Yes, though it might be hard to fit it into 13 kilobytes if you plan on doing an FPS game.
- Can I use CoffeeScript or TypeScript?
- Can I use WebAssembly and ⁄ or Rust?
- Can I use compression through the self-extracting PNGs?
- You can use it, but remember that the zip is as good, or even better in terms of compression than PNGs, so there's no point in doing so.
- Do I have to register somewhere?
- No, you just need to submit your game through a form when it's ready.
- How many games can I submit?
- As many as you want, there are no limitations.
- More questions?
- Send them in via email or social media or post them in the dedicated topic at the HTML5GameDevs forums.
If You have any questions or propositions please feel free to contact us via e-mail: email@example.com.
The other options include visiting our profiles on Twitter or Facebook,
or joining our Slack channel and sending us the private message.