The theme is Symbiosis 

Welcome to OpenGameArt.org’s Summer Game Jam 2025!  

This jam challenges you to create a game using assets from OpenGameArt.org. Since 2009, the OGA community has been uploading artwork, music, and sound effects for 2D and 3D games—everything from sprites and tilesets to textures and backgrounds—available for free download.

Let’s see what games you can build with these awesome assets! 

Rules:

1) Game development must begin when the jam starts.

Pre‐production (sketches, design documents, paper‐based level designs) is allowed before the jam. Searching for and gathering OGA assets in advance is permitted. You may also expand existing OGA assets or create new ones before the jam begins.

You can use any engine or software (e.g. Gamemaker, Unity, Java, HTML, Scratch, SHMUP Creator, RPG Maker, even a custom engine) provided you have the necessary licenses/permissions.

Any game‐specific coding, prototyping, or gameplay testing done before the jam start is not allowed.

Any spam projects or projects that have clearly been in development prior to the jam will be removed (sorry about that).

2) You must use art from at least six different OGA submissions.

One OpenGameArt.org submission URL counts as one work.

You may include additional assets (with proper rights/permissions). If you can’t find suitable OGA assets for your project, you may create your own—but you must upload those assets to OGA before the jam ends for them to count toward the six‐asset requirement.

3) Credit every asset author in two ways: inside the game and on your itch.io page.

If your engine cannot support a Credits menu, make a good‐faith effort to include a credits screen or easily accessible credits section.

itch.io page credits: Include the same list of credits in the Description field of your submission.

If you distribute the game as a downloadable archive (e.g., ZIP, installer), include a README or CREDITS text file with the same information.

Example credit: 

Title: Seasonal Platformer 

Tiles Author: GrafxKid 

URL: https://opengameart.org/content/seasonal-platformer-tiles 

License: CC0 (http://creativecommons.org/publicdomain/zero/1.0/legalcode) 

Modifications: Color palette adjustments applied. 

Note: If you have an OGA account, you can use the “Collections” feature to generate a credits file automatically. Please read the instructions on using this feature carefully. When you modify existing art, consider uploading your derivative back to OGA. Trivial derivatives (scaling, re‐coloring, outlining) need not be uploaded.

4) You must have the legal right to use all assets.

For non‐OGA assets, follow their terms and credit them as you would OGA assets.

Generative AI assets are allowed only if you comply with the AI tool’s terms, disclose AI use on your itch.io page, and list model/website/license details in your credits.

Note that OpenGameArt.org does NOT allow AI generated assets to be uploaded the site. 

5) No promotion of discrimination or political agendas.

Content that endorses racism, sexism, homophobia, or similar is prohibited.

There is a zero tolerance on this policy. 

6) Games must run on Windows 10 (native EXE or browser).

Other platform builds are optional. 

Entries that require third‐party account sign‐ups or services will be refused.

7) No NSFW (smut) content.

Violence is acceptable; explicit sexual content is not.

8) Games must not trigger common antivirus software.

9) Have fun!

Any queries or questions please reach out:

  OGA Discord OGA IRC Channel 

OGA Summer Jam 2025 Community Channel

Banner, logo and background images for OpenGameArt.org's Summer Game Jam 2025 use art from the following OGA submissions, changes were made:

Title: Summer pixel art seamless background

Author: CraftPix.net 2D Game Assets

URL: https://opengameart.org/content/summer-pixel-art-seamless-background

License(s): * OGA-BY 3.0 ( http://static.opengameart.org/OGA-BY-3.0.txt )

File(s):    * summer_pixel_art_seamless_background.zip

Title: Sara--Steps in the right direction

Author: Redshrike

URL: https://opengameart.org/content/sara-steps-in-the-right-direction

License(s): * OGA-BY 3.0 ( http://static.opengameart.org/OGA-BY-3.0.txt ) * CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/)

File(s): old sarasprites summary.png