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!
Voting ended, winners announced!
Share the love for HTML5 games and support the js13kGames competition!
See the Contact section for more details on how to get in touch.
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.
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 2019 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.
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 200+ 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.
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 400,000 learn to code and make games.
Product Owner and Principal Engineer in the Defold game engine team at King in Stockholm. 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.
Founder and CEO of Famobi, a cross-platform game service with 500+ HTML5 games and high revenue-shares for developers and publishers. Before Famobi, Ilker founded SpielAffe.de and KralOyun.com, Germany's and Turkey's biggest online gaming portals. After the successful exit in 2015, Ilker focusses on supporting talented HTML5 game developers. By doing this he wants to bring app quality to web and change the industry.
WebXR category experts
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, including a proof-of-concept that Web Monetized a browser-based Quake server. He's looking forward to seeing what developers will come up with for the competition!
Yuriy Dybskiy is a founder of Puma Browser, a privacy focused mobile web browser with a new way to pay for content and services without ads and tracking. Previously they worked with the following companies: Lyft, Parse, Meteor, Cloudant and a few others. They helped organize Apache CouchDB Conf and Worldwide Meteor Day and had a bunch of startup explorations that led to “experience” rather than great outcomes. Outside of work they enjoy spending time in nature, playing tennis, riding motorcycles, reading, taking photos and dancing Argentine Tango.
Web Monetization category experts
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.
From working on feature animated movies at Dreamworks and Disney, to helping create the HoloLens at Microsoft, and now helping to shape the future of a more dimensional web with Babylon.js… Jason has dedicated his career to the intersection of art and technology. Jason is driven to shape a future for his children, full of richer worlds, more immersive stories, and deeper human connection.
1st place xx142-b2.exe by Ben & Salvatore
2nd place Bounce Back by Frank Force
3rd place Retrohaunt by Donitz
4th place Push Back by Lomateron & Erik
5th place The Wandering Wraith by Mateusz Tomczyk
6th place [SWAGSHOT] by Rémi Vansteelandt
7th place Back Attacker by Yeon Juan
8th place Dwarfs: There and Back Again by mvasilkov
9th place nano-wirebot by Mariano Lambir
10th place Play Back by madmaw
11th place Back 2 Back by David Stark
12th place Entangled by Japheth
13th place SenTetrox by sirxemic
14th place Triangle: Back To Home by Viktor Uhryn
15th place racer by James
16th place Pizza Undelivery by Nils Gawlik
17th place oh, flip! by Bryan Perfetto
18th place Backcountry by Piesku
19th place Backshot Tactics by Antonio Salvati
20th place Regresso by lopis
- 21. Sopwith Back by elementalsystems
- 22. sing-song ding-dong by Richard Munn
- 23. Kitaku by Brian Hambley
- 24. Snake vs Invaders by Baturinsky
- 25. A ship in time by dodormeur
- 26. VOIDCALL by Phoboslab
- 27. Backstabber Hero by Niklas Berg
- 28. Marshmallow playback by Gabor Heja
- 29. Yet Another Doom Clone by Nicholas Carlini
- 30. 20461 Dioretsa by burntcustard
- 31. Way Out by SamirH
- 32. FALL BACK HERO by Gotshi, Tayrassin, Tricsi
- 33. Get Back Up by David Durham
- 34. The Martians are Back! by Schnark
- 35. 2AP: Backyard Assault by Baturinsky
- 36. PUZZLEggs by Jani Nykänen
- 37. Super Bunny Strikes Back! by FoumartGames
- 38. Reverse Invaders by David Storey
- 39. I Want to Help Fight the Demon Overlord, but I’m Just an Intern! by Dietrich Epp
- 40. Repeewsenim by Kushagra Gour
- 41. Time Runner by Marek Łabuz
- 42. Backbeat by razh
- 43. Humpback Revenge by gorgovic
- 44. Palindrome by Daivan Trinh
- 45. Zooback Rider by Curtastic
- 46. ZombieBurger by Olivér Sepsik & Dadi5
- 47. Bubba's Back Room by Eric Rowell
- 48. Back & Forth by Gagik Papikyan
- 49. Rebound by Michał Kuliński & Michał Skowronek
- 50. Backstabbers by Milan Donhowe
- 51-60. ROW, LibreCraft, Back on Track (mania), Entombed, Back to Earth,
Back to Life Adventure, Xycore, Fat Kids on Trampoline, IT-Man, Tanky McTankface
- 61-70. Slipstream 13k, Backsteroid, Playback, Fall_Back!, wolf and sheep,
BackFlipped, Backspace Magic, JSRacer, Quick Wins, Conflict Management
- 71-80. LOST ROBOT, Letchworth Village, Turtleback, Paperback, Byte Rider,
Infiltration, Bot's Back, ape naps, Dawn Breaker, Cursed
- 81-90. Space Wizard Toast Spinning, Electro, Watch Your Back!, How to send back…, bakpak, BACKSPACE - Return to planet Figadore,
Noegnud (mobile-only), Anti-gravity cave, BiT - Back in Time, Can't Get Back
- 101-110. Llama Adventure, Backionary, Back To The Stars, Start Over, Back from Kooky Island, Return to the Moon, Back to the Nest, VicBlitz, SNAKE IT BACK, Eat My Dust!
- 111-120. Rectangles, BounceBack, AI, Begone!, BACKSIDE, Super Backpacking Adventure, Fall Back!, Don't Go Back, Troposphere, Slime'n Says, Back on Track
- 121-130. Back to School, Back Scratching Salon, Back Down The Tower, DeStar, Behind the Scenery, Big Fish, Gem of truth, back to rescue, Back Back Back Back Gone!, Grow Back
- 131-140. Flight Back Home, BackStone, Lights Back On, Eftiell: Back to the Crypt (mobile-only), Scroll! (mobile-only), The Back-up of YOU, Backout, Traversor, Get Jess Back, Go Back
- 141-150. Jewelsback, Back To That Platform I Was On Before Jumping, Detro, Scroll Run, Cindy's Nightmare, Back to Skull Island, The Backlash, Back...to where we left off, Infinite Missiles, Back to oxygen
- 151-160. Game of Backstabbers, Shoot2Live, Godai is back, Dottie Back to Sun, Numerical Error, Back Read, Comeback, Oh, My Poor Rheumatic Back, Backshooter, Got your back!
- 161-170. Back to the Island, Back Home, BACKSPACE, Block Hammer, Bounce It Back, Jet Back Gravity, Bring Back the Berries, MeMo, Back to the beginning, Fight back
- 171-180. Songbirds, Ninja Take Back, Back to the 80s, Time remnants - go back in time and fix the timeline, Game of Ur, Backo, Toe-Tac-Tic, Back To Source, Back in Dino, Backpack Monsters
- 181-190. Beat Bricks, Pew Pew, Bring The Number Back, Coiner, Throw back (mobile-only), Tilted (mobile-only), Encoded Maze, angle, firedrone, Meadow
- 191-200. Dengar, Awkward Turtle, The Empire Str13ks Back, Circle Back, watchmyback, Deserter, Back Online!, We Must Go Back!, Tube Masters, Reverse Simon
Winners - Mobile
1st place Push Back by Lomateron & Erik
2nd place Dwarfs: There and Back Again by mvasilkov
3rd place oh, flip! by Bryan Perfetto
4th place Backcountry by Piesku
5th place Backshot Tactics by Antonio Salvati
6th place sing-song ding-dong by Richard Munn
7th place Backstabber Hero by Niklas Berg
8th place Get Back Up by David Durham
9th place The Martians are Back! by Schnark
10th place Super Bunny Strikes Back! by FoumartGames
- 11. Reverse Invaders by David Storey
- 12. Repeewsenim by Kushagra Gour
- 13. Back & Forth by Gagik Papikyan
- 14. ROW by Ben Fox
- 15. Back to Life Adventure by Lance Ewing
- 16. wolf and sheep by BOB
- 17. BackFlipped by Tom Hermans (Auroriax)
- 18. Conflict Management by Markus Fisch
- 19. Byte Rider by Frank Mitchell
- 20. Bot's Back by Jordan J Watkins
Winners - Server
1st place Backshot Tactics by Antonio Salvati
2nd place Slipstream 13k by ThirtyThree Games
3rd place Backsteroid by dunin
4th place Fall_Back! by Nick and Dave
5th place Back to the Battle Ship by Jorge Rubiano
- 6. Backionary by Petah
- 7. Game of Backstabbers by Michael Wolken-Möhlmann
- 8. Godai is back by LuisQuin
- 9. Beat Bricks by KeithK
- 10. Throw back by Anej Gorkič
Winners - WebXR
1st place Johnny Smiter: Episode Zero by Paul Brunt
2nd place Back to Space by Timmy Kokke
3rd place Go Back (And Do It Again) by Arturitu
4th place Projection by Julian
5th place Back up by Holo & Michelle
- 6. VR is back by Jordi Ros
- 7. Backorder Storehouse by Julien KERMAREC
- 8. Do Not Look Back! by Jerome Lecomte
- 9. Back Relax by Randy Tayler
- 10. Get Back From Robot City by Kev Etchells
Winners - Web Monetization
1st place [SWAGSHOT] by Rémi Vansteelandt
2nd place Back 2 Back by David Stark
3rd place Backcountry by Piesku
4th place Regresso by lopis
5th place Sopwith Back by elementalsystems
- 6. sing-song ding-dong by Richard Munn
- 7. Backstabber Hero by Niklas Berg
- 8. FALL BACK HERO by Gotshi, Tayrassin, Tricsi
- 9. The Martians are Back! by Schnark
- 10. Super Bunny Strikes Back! by FoumartGames
100 × js13k 2019 t-shirt
One hundred js13kGames 2019 t-shirts (and 100 custom bottle openers) shipped worldwide for free.
5 × Build Arcade Games with Phaser 3 course
Five courses combined into Super Combo Pack 1 – Build Arcade Games with Phaser 3 from Jared York.
13 × GitHub account
Thirteen paid GitHub Pro plans - personal accounts with unlimited private repositories for twelve months each.
10 × PlayCanvas account
Ten 6-month PlayCanvas Personal accounts offering a cloud-hosted, collaborative platform for building games.
3 × Jscrambler license
Three Jscrambler Startup licenses for three months each.
3 × CodePen Pro account
Three CodePen Pro Starter accounts with lots of cool features for 12 months.
1 × Proto.io account
One Proto.io account with Startup plan for 12 months.
5 × NodeBB hosting
Five Hamlet hosting plans for 12 months each from the NodeBB team.
5 × SitePoint Premium subscription
Five SitePoint Premium subscriptions for 12 months each.
20 × CSS Battle Pro account
Twenty CSS Battle Pro accounts for 6 months each.
Full power of the hardware.
Handheld touch devices.
The first four categories (Desktop, Mobile, Server, Web Monetization) are interchangeable
(you can submit to any or all of them), while WebXR results will be treated separately.
Desktop category (overall)
Top 100 games
- 1st place: Proto.io, CodePen Pro, SpriteStack, Build Arcade Games, Danger Crew, GitHub, CSS Battle Pro, Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
- 2nd-3rd places: CodePen Pro, SpriteStack, Build Arcade Games, Danger Crew, GitHub, CSS Battle Pro, Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
- 4th-5th places: SpriteStack, Build Arcade Games, Danger Crew, GitHub, CSS Battle Pro, Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
- 6th-10th places: Danger Crew, GitHub, CSS Battle Pro, Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
- 11th-13th places: GitHub, CSS Battle Pro, Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
- 14th-20th places: CSS Battle Pro, Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
- 21st-100th places: Evil Glitch, Glitchbuster, js13k t-shirt + bottle opener
Top 15 games
- 1st-3rd places: Construct 3, WebStorm, SitePoint Premium, HTML5 Gamedev Mini-Degree, Phaser Editor, Pyxel Edit
- 4th place: WebStorm, SitePoint Premium, HTML5 Gamedev Mini-Degree, Phaser Editor, Pyxel Edit
- 5th place: SitePoint Premium, HTML5 Gamedev Mini-Degree, Phaser Editor, Pyxel Edit
- 6th-13th places: Phaser Editor, Pyxel Edit
- 14th-15th places: Pyxel Edit
Top 5 games
- 1st-5th places: NodeBB, Fullstack Webdev Mini-Degree, AppDrag Cloud Backend ⁄ CMS Pro, CryPixels
Web Monetization category
Top 5 games
- 1st-3rd places: Jscrambler, Kendo UI, Making Money with HTML5, Aseprite
- 4th-5th places: Kendo UI, Making Money with HTML5, Aseprite
Top 15 games
- 1st-3rd places: Oculus Quest, WebStorm, PlayCanvas, js13k t-shirt + bottle opener
- 4th-5th places: WebStorm, PlayCanvas, js13k t-shirt + bottle opener
- 6th-10th places: PlayCanvas, js13k t-shirt + bottle opener
- 11th-15th places: js13k t-shirt + bottle opener
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. 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, Babylon.js, and Three.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 for the competition is back. 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 2019
The competition starts at 13:00 CEST, 13th August 2019 and ends at 13:00 CEST, 13th September 2019. 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.
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 16th 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.
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.
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.