This jam is now over. It ran from 2022-11-04 16:00:00 to 2022-11-06 16:00:00. View results

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Compose an original soundtrack of any style for an imaginary game, in 48 hours!

But hold on, how am I supposed to know what to compose if I don't know anything about the game I'm composing for?

Well, that's the twist of the jam, you don't. You need to imagine that part by your own. (There's also a theme to help you with that!)




artwork by @System ST91

Note: The themes here are more like an inspiration, and strictly speaking there are no specific "musical theme" for you to follow and that you can compose in any genre you want, so the submissions can be as diverse as possible.


Compose at least 2 minutes worth of soundtrack. 

You can compose as many tracks you want, providing that all of them is practically made for the same game, meaning each tracks needs to be interconnected and not be far-off from each other. To achieve this, leitmotifs are strongly recommended.

It can be in any genre you want: 8-bit, orchestration, electronic, ambient, etc. It can even have vocals/lyrics! It can also be loopable, have a proper ending, connect to the next track, or just a simple fade-out.

You must submit the original recording in either .mp3, .wav or .flac on AND on a streaming service of your choice (preferably Soundcloud), with a screen recording or screenshot(s) or pdf of your DAW, score, or tracker. (This is to prove that you are the original creator)

Additionally, you can also provide a description of what kind of game the soundtrack you composed is like, what does each track represent in the game, etc.

Everything submitted must be original and not contain any copyrighted content.

Listen to the previous jam's submissions!


How long? at least 2 minutes, no longer than 10 minutes all tracks combined.
How many tracks? at least 1 track
What do I need to submit? • .mp3, .wav or .flac file of the track(s)
          ○ zipped if many
           ○ The title of the file should have your username on it. (E.g. Lone Rabbit - Great Example.flac) 
 • Link(s) to the tracks on a streaming service of your choice (preferably SoundCloud / YouTube)
 • Screen recording or screenshot(s) of your DAW or tracker (pdf if a score)
           ○ either uploaded as screenshot on or uploaded to YouTube as screen recording 
 • Description of soundtrack (e.g. genre, runtime, software you used, etc.)
 • Cover art (optional but ideal to differentiate your submission)

It is recommended for you to post your work on SoundCloud (or YouTube) at some point after the jam since we plan on making a playlist of all the submissions there! ^^ Feel free to use the tag #OSTCompJam on your tracks as well!

Q: Will there be any themes? A: Yes, there will be a picture and word theme (choose one or both) announced at the start of the jam.
Q: What program/DAW can I use?  A: You can use any programs, DAWs, or trackers you want. You can even handwrite your scores and perform it yourself.
Q: Can I work in teams?  A: You can only work in solo or in groups of no more than 2. However, you can have additional people to record parts for your soundtrack.
Q: Can I use pre-made loops?  A: No
Q: How about samples and sfx? A: Yes, but please make sure you have the legal rights to use them.
Q: Can I submit a soundtrack for a game that already exists? A: No, it is required that all participants compose an original soundtrack for a game that does not yet exist before the jam.
Q: Can I submit multiple entries?  A: No
Q: Can I use this jam to finish/submit an existing project I already started on? A: No, it is required that all participants start from scratch for this jam. If you really want to start off from an existing project anyway, please make sure it is at least less than 30% finished as it wouldn’t be fair to other participants otherwise.
Q: Can I use the soundtrack I composed for other projects later on? A: Yes, we do not own anything you submit. All rights are reserved to the original composer(s).
Q: Can it be a remix? A: No, but you can take some inspirations and ideas from them!
Q: I'm having trouble uploading/submitting! A: How to upload and submit your soundtrack!


The rating period lasts for around a week after the jam ends and is open to everyone. Your soundtrack will be judged on:

  • Impression; does it catch your attention or did you get bored?
  • Creativity; did the submission overall seem new or unique, did the composer(s) try to innovate? etc.
  • Composition; musical writing, leitmotifs, pacing, cohesion, catchiness, etc.
  • Quality; mixing/mastering, sound design, are the instruments/sound banks chosen appropriate? etc.
  • Correlation to theme; to which degree does it fit the jam's theme?

Files will be locked during the voting period, but feel free to continue and/or finish the soundtrack to your liking after the jam ends.

Participants who tries to manipulate the voting system will be disqualified.


There will be a compilation album which will be released to most major streaming services and as CDs for the top submissions as well as for some of my favorites. We will contact you about this after the jam ends. You will also receive the majority split of the streaming royalties as well! We will not include your soundtrack without your consent. You can check out the previous jam's compilation album here!

Looking for a partner or want to hang out with us? Feel free to hop into our Discord server! Have fun with this one! :D


Check out the previous OST Composing Jams!


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All submissions
Windows (2)
macOS (2)
Linux (2)
Android (2)

No submissions match your filter

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OST Composing Jam CRUNCHTIME 02 Submission
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A submission for the OST Composing Jam Crunchtime 02, a Cyberpunk theme for an imaginary game
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Our Entry for the OST Composing Jam Crunchtime #2
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Played irl on piano and drums
Those who protect the peace of outer space, equipped with high tech spaceships and advanced weaponry!
My first submission for any composing jam.
Music form Crunch Game jam