DEV Community

June Solstice Game Jam June Solstice Game Jam

June Solstice Game Jam

Please sign in to follow this challenge

Build a game inspired by June and its many celebrations.

Challenge Status: Live Ended

We're excited to kick off the June Solstice Game Jam, running from June 3 through June 21 and ending right on the solstice itself!

Whether you're in the northern hemisphere marking the longest day of the year or in the southern hemisphere observing the shortest, the solstice is a global moment of transition. June is also a profound month for identity, history and community in the U.S. and across the world.

We are celebrating authenticity and LGBTQIA+ history with Pride month, which also happens to be the birth month of Alan Turing – the famous computer scientist behind the "Turing Test" for artificial intelligence who was persecuted for being gay. June also marks Juneteenth, a day to celebrate an important milestone towards the freedom and liberation of Black Americans. It's a time dedicated to reflection, honoring resilience, and amplifying Black joy.

But June isn't only about deep history! This month brings the electric teamwork and high stakes of the World Cup, bringing the entire planet together in the spirit of play. And if sports aren't your thing, June also serves up delightfully specific celebrations like International Sushi Day and National Flip-Flop Day.

Whether you want to build something deeply meaningful or delightfully goofy, this jam is your canvas. We've got some great prizes for five lucky winners.

Five Winners will each receive:

All participants with a valid submission will receive a completion badge.

Key Dates

  • Contest start: June 03, 2026
  • Submissions due: June 21, 2026
  • Winners announced: July 09, 2026

Badge Rewards

Completion Badge
Completion Badge
Winner Badge
Winner Badge
Best Ode to Alan Turing Badge
Best Ode to Alan Turing Badge
Best Google AI Usage Badge
Best Google AI Usage Badge

Find Out More

Ask questions and share your ideas on the June Solstice Game Jam Launch Post.

View Launch Post

Challenge Prompt

Build a Game Inspired by the June Solstice

The June solstice arrives on June 21 — the longest day of the year for half the world, and the shortest for the other half. Build a game inspired by the solstice or any other June celebration: think Pride, Juneteenth, light and darkness, the passage of time, and anything else that comes to mind.

Our theme is intentionally broad to allow room for your creativity to shine. Please interpret this prompt however you'd like. A platformer where daylight is your resource? A puzzle game that resets at midnight? A narrative about reaching a turning point? Any angle is fair game!

Additional Prize Categories:

  • Best Ode to Alan Turing: We're thinking algorithms, code-breaking, and artificial intelligence. Honor the father of modern computing in your game's mechanics, narrative, or design.

  • Best Google AI Usage: Tell us how you leveraged Google AI for this submission. Did you build with Antigravity, experiment in Google AI Studio, or use the Gemini CLI? Or is there a Google AI product embedded in your build such as the Gemini API or any Google Cloud product such as Cloud Run? Tell us all about your experience!

Submission Template

Judging Criteria:

  • Relevance to Theme: Does the game clearly connect to the June solstice or celebration themes?
  • Creativity: Is the concept original or is it an interesting take on a familiar idea?
  • Technical Execution: Is the game functional, well-built, and playable?
  • Writing Quality: Is the submission post clearly written and engaging?
  • Use of Prize Category (optional): If pursuing a prize category, does the submission meaningfully engage with it?

How To Participate

Build a game and publish a post on DEV using the submission template above. Your post should include a demo video of your game and provide an overview of how you built it.

Frequently Asked Questions

Participation

Can I submit to multiple prompts?

Yes, you are welcome to submit to multiple prompts.

Can one submission qualify for multiple prompts?

Yes, if your submission offers a solution to multiple prompts, it can qualify for multiple prompts.

Can I submit more than once?

Yes, you can submit multiple submissions but you'll need to publish a separate post for each submission.

  • In the event that you may win multiple times, and your submission is very close with another participant, we will favor the other participant.
  • In the event that you do win multiple times, you will only receive one winner badge.

Can I work on a team?

Yes, you can work on teams of up to four people.

  • If you collaborate with anyone, you'll need to list their DEV handles in your submission post so we can award a badge to your entire team! Please only publish one submission per team.
  • DEV does not handle prize-splitting, so in the event that your submission wins, you will need to split the prize amongst yourselves. Thank you for understanding!

How old do I have to be to participate?

Participants need to be 18+ in order to participate.

If I live in X, am I eligible to participate?

For eligibility rules, see our official challenge rules.

Submission

Do I need to build a web game?

Nope! To enable all sorts of games to be eligible (beyond web games) video demos can be submitted. Your video should be a true demo of the game. Feel free to include a voiceover to explain any context the judges should know.

Does my game need to be brand new?

Yes, your game should be a new creation built during the jam period (June 3–21).

Can my submission include open source code or assets?

Riffing on open source code and borrowing and improving on previous work/ideas is encouraged but it's important your changes are significant enough to ensure your submission is valid.

When does riffing become plagiarism?

It will depend, but transparency is important, license compatibility is important. You can use someone else's code to give you a jumpstart to demonstrate your ideas on top of someone else's base, but not just re-package the base. It should be clear to the judges what you added to the project in terms of the code and conceptual inspiration. This means, you should clearly state what you were building on and what elements are original to this new submission. When building on existing code, we expect a significant change that adds something tangible to the output. i.e. a new animation, a new sprite, a new function, a new presentation. Not just changes to the source - i.e. changing colours, changing one sprite, changing one function.

What happens if my submission is considered plagiarized or invalid?

Anything deemed to be plagiarism will not be eligible for prizes. Incidental plagiarism may simply result in your disqualification from the challenge (regardless of the number of other valid submissions you have published). Egregious plagiarism will result in your suspension from DEV entirely. Any non-generic, non-trivial usage of prior work, including open source code must be credited in your submission.

Do submissions have to be in English?

Non-English submissions are eligible for a completion badge but not eligible for prizes due to the current limitations of our judges. We will not be judging on mastery of the English language, so please don't let this deter you from submitting if you are not a native English speaker! We hope to evolve this in the future to be more accommodating.

Do I need a license for my code?

You are not required to license your code but we strongly recommend that you do. Here are some you may consider: MIT, Apache, BSD-2, BSD-3, or Commons Clause.

Can I use AI?

Use of AI is allowed as long as all other rules are followed. We want to give you a chance to show off your skills in realistic scenarios. If you use AI tools to help you achieve your submission, all the power to you.

How do I embed my project directly into my DEV post?

Our editor supports many types of embeds, including: Stackblitz, Glitch, Github, etc. You can typically use the {% embed https://... %} syntax directly in the post. Click here for more information on our markdown support.

  • For CodePen, you will need to use this syntax: {% codepen http://... %}
  • For CodeSandbox, you will need to use this syntax: {% codesandbox http://... %}

Judging and Prizing

How many winners will there be?

We'll select three winners for the overall prompt, and one winner for each additional prize category (Best Ode to Alan Turing and Best Google AI Usage), for five total winners.

Can a submission win multiple prize categories?

A single submission can win one overall prize and/or one prize category.

Can there be ties?

In the event of a tie in scoring between judges, the judges will select the entry that received the highest number of positive reactions on their DEV post to determine the winner.

How will I know if I won?

Winners will be announced in a DEV post on the winner announcement date noted in our key dates section.

When will I receive my DEV badge?

Both participation and winner badges will be awarded, in most cases, the same day as the winner announcement.

When will I receive my prizes?

The DEV Team will contact you via the email associated with your DEV profile within, at most, 10 business days of the announcement date to share the details of claiming your prizes.

What steps do I need to take to receive my cash prize?

The winner (including each member of a team) may be required to sign and return an affidavit of eligibility and publicity/liability release, and provide any additional tax filing information (such as a W-9, social security number or Federal tax ID number) within seven (7) business days following the date of your first email notification.

June Solstice Game Jam Rules

NO PURCHASE NECESSARY. Open only to 18+. Contest entry period ends June 21, 2026 at 11:59 PM PDT. Contest is void where prohibited or restricted by law or regulation. All entries must be submitted during the contest period. For Official Rules, see June Solstice Game Jam Contest Rules and General Contest Official Rules.