This jam is now over. It ran from 2025-09-15 22:59:00 to 2025-09-30 22:59:59. View results

We are excited to announce the 2025 JernJam!

The Theme is:

Man vs Nature

This year, we are adding some fun new criteria to the voting, hoping to push the jam into an educational direction! 

Jern Jam! is a community-driven game jam co-hosted by Twitch streamers IrishJohnGames and SciAnts_Streams. It blends game development and science communication, inviting creators to turn educational ideas into interactive games. The event celebrates creativity, learning, and play as powerful tools for understanding the world and inspiring future learners.

Reminder this year is the first year we're doing this as Twitch Partners! Also, we'll be partnering up with the amazing Twitch Ambassador, @sciants - which brings even more opportunities for pretty much every aspect of the jam, especially around visibility. If all goes well, there's a good chance your game will end up being featured on the front page of twitch during our special awards ceremony overlap event when voting ends and the winners are announced! 

Feel free to use any game engine. I encourage you to step outside your comfort zone and try new things for the Jam! It will last 2 weeks so you will hopefully have plenty of time to give something other than your usual software and styles a shot!

You are free to use any assets you have. Just be careful with licensing when working within teams. 

The Jam is open to everyone. You may work solo, or in teams of up to 4!

Please if you have spaces on your teams, consider inviting some of the new folk to join you.  Plenty within the community would love to learn from more experienced folk, and this is the perfect way for that to happen. 

There will be rewards for groups with a range of skill levels.

Do not be afraid to reach out on the Discord channel to advertise that you are looking for a team: https://discord.gg/FTFhCM5.

  • Absolutely No AI generated content. No exceptions!
  • Teams of MAX 4 people
    • Teams above 4 are not permitted.
  • No early starters or submitting pre-made games!
    • The games submitted must be created between the start date and the finish date of the jam. Please adhere to this in the spirit of sportsmanship!
  • No extensions
    • Extending time limits can be unfair to others. Pay close attention to the dates described on this page.  
    • There will be no extensions granted under any circumstances.
  • Follow the theme
    • Please try to stay as close to the theme as possible!
  • No NSFW content
    • As there are plenty of streamers within the community, please keep whatever you create stream safe. 
  • If you have any questions/concerns, ask on Discord!
    • This also goes for complaints - just see the #complaints channel.

Voting will be done by the Participants. These are the criteria:

  • How well the theme was used
  • Fun to play
  • How it looks
  • Educational Value
  • How it sounds
  • Innovation

Prizes will be distributed to the winners of the Jam as well as some runner-up prizes. These include donated prizes,  assets, courses and games.

For teams, all winning participants will receive a number of prizes, so teams will be responsible for dividing them up among members.

Bonus prizes may be given for special categories announced later.

How do I add team members to my entry?

  1. Enter the project Dashboard.
  2. Click menu 'More > Admins'.
  3. Enter the username/profile URL and click [Add admin].
  4. Send the 'agree to' link to the collaborator
  5. Turn on the 'Contributor' toggle.

For any and all questions or concerns join the Discord server: https://discord.com/invite/FTFhCM5

Twitch: https://www.twitch.tv/irishjohngames itch.io: https://irishjohngames.itch.io/ Twitter: https://twitter.com/IrishJohnGames

Twitch: https://www.twitch.tv/Sciants_streams itch.io: https://itch.io/profile/sciants-media Twitter: https://twitter.com/sciants_media

So far! ( DM John on Discord to become a sponsor :) )



Chris & Tony West
Bit Gamey IrishJohnGames



SmiteSoft
BlackMageUK
clayman_dev

SciAnts_Streams

Submissions(38)

All submissions
·
Browser playable (25)
·
Windows (18)
macOS (3)
Linux (8)
Android (1)

No submissions match your filter

Bee Keeper simulation tycoon game
Simulation
Play in browser
Ever wonder what it's like to be in a Bear Attack?
Simulation
Play in browser
Build the famous Bell Rock Lighthouse in a beautiful and calming world.
Simulation
Worth downloading! Fight the wildfires spreading on the island in this arcade flight simulation!
Simulation
Quake-style First Person Shooter
Shooter
I AM WOLF. YOU ARE HUMAN.
Puzzle
Play in browser
A fun short point & click game about helping people biten by various things found around Australia
Puzzle
Play in browser
Simulation
Play in browser
A simple tale of a shipwrecked man trying to survive and find his way home.
Survival
Play in browser
3D Strategic Tower Defense
Strategy
A shooter thrill in 3-Dimensions that leaps at you! Packed with action and starring "MAN".
Action
Play in browser
Hunt a Trex in a forest
Action
Survivor meets 7 days to die
Educational
A silly little game about marine science!
Educational
Play in browser
An incremental game about cutting down a giant tree, or maybe it's a study of man vs his own nature?
Educational
Play fun desert themed minigames
Rhythm
Play in browser
Guy recieves a letter from a mistery girl. To see her, he must reach the top a tower by solving puzzles.
Puzzle
Navigate through uncharted rogue region of space where your only tool is your radio
Puzzle
Play in browser
Save the infected animals in the nature preserve!
Action
Play in browser
An RTS/Colony Sim Thing submitted to the Jern Jam 2025!
Play in browser
You're a tree, and there's an unsustainable company threatening you! Make it sustainable in this bullet hell game!
Climb the rocks and learn about the various rock types
Forced to uproot, how will you survive?
Adventure
Survival
Play in browser
Dance with Lumina’s glow to outwit nature’s sneaky shadows in this cozy puzzle
Platformer
Play in browser
For Jern Jam 2025
Play in browser
Cultivate your field and fight against scutch!
Simulation
Play in browser
Weed out invasive flowers from your rose garden as quickly as possible.
Puzzle
Play in browser
Use your parabola to feed the brain with equations.
Educational
Play in browser
Play golf, save mankind and learn about nature
Sports
Play in browser
Set planets in motion
Educational
Play in browser
Release Butterflies From Their Blocks
Puzzle
Play in browser
An Ecopunk Adventure Prototype
Adventure
Play in browser
Action
Play in browser
Blob
Simulation
Play in browser
A "Man vs Nature" themed game for the 2025 Jern Jam.
My first ever Game Jam submission - Jern Jam 2025
Survival
Play in browser
Man tries to run away from nature
Survival