What is the gm(48)?

The gm(48) is a quarterly community event centered around a competition, in which game developers, by themselves solo or in teams, must develop a game in GameMaker Studio 2 in 48 hours.

These competitions are commonly referred to as game jams. Once the games have been submitted, everyone will play, rate and critique the submissions for two weeks, the ratings from which the top three games will receive licenses to GameMaker Studio 2 as prizes.

The game jam is open to GameMaker Studio 2 developers of all ages, abilities and backgrounds. Beginner or expert, young or old, artist or programmer, all are welcome in the gm(48) game jam community.

In a limited sense, yes.

You are permitted to start pre-production, which we consider to be brainstorming, storyboarding, game design document, etc, of your game before the game jam starts. You can't start production of any assets or do any coding. Even art sketches can be considered cheating.

You participate by creating a game from scratch in the 48 hours from when the game jam starts to when it ends.

Before the deadline is reached, you must submit your game to the website. You'll need an account on the website in order to do that.

You don't have to register or sign up before the game jam starts.

Check out our Quick Guide for more information.

No, but...

There are exemptions to this. Rule #4 covers all the details.

→ gm48.net/rules

No, but many developers use the GameMaker project files to learn from, so we encourage you to upload your project, however "gross" it might be. Let's be honest, everyone's project is spaghetti code after 48 hours.

As thanks for giving back to the community, you'll get an achievement for uploading your project to your entry.

The score is calculated using the Bayesian average method. This means that a game with one 100% rating can't score higher than a game with five 80% ratings. In other words, the number of ratings a game has received plays a role in calculating the score. That's why the averages in the rating categories doesn't match up with the final score.

Yes, you fully own the rights to your game. We reserve the right to use your game for promotional purposes. We can't steal or sell your game. → Terms and Conditions

Submit your post-jam game to GX Corner (GXC). GXC is a collaboration between YoYo Games and Opera to bring together a brand new platform for Opera GX users to play, share and discover games made by independent GameMaker developers, such as yourself. → Learn more

Hear it from participants

With over 2000 participants to date, the gm(48) game jam has for years been instrumental in enabling developers to become better at game design, game development and GameMaker Studio 2.


Whether you're looking for a tight-knit community, putting your abilities to the test, or simply scratching that game development itch, the GM48 is the definitive GameMaker experience.


It was a gloomy theme for me, and looking back it was fun to make, especially the voice stuff! :D


First time in Gm48. Really tough for me and my team because we had been too ambitious and the low experience didn't help! Anyway, very funny, I will participate again.


I've done this a couple times now, and each time is more fun than the last. It's cool seeing how I've improved since I started, and overall participating has been a great deal of fun!


This jam was a fun experience, and I look forward to the next GM48!



This was a tough one. It was a challenging theme. I love seeing what other people come up with with theme-based Jams. So cool how other people think.


This is a great game jam. I joined this game jam when i was only 2 weeks into coding, and i enjoyed every second.

In my project Countdown is a project in which I have not put all my work, but in The Legend of Princess Kidnap yes. I hope you like it

GM48 is not just a jam it is a fun way to test our knowledge.It makes us think in different ways to come up with good ideas.I think everyone should try it.While I was creating Static I learned a lot about pixel art and my weaknesses in game development.I really enjoyed it.

Josh K.

I always have fun in this game jam. Every time I participate I have an amazing time and always push myself to learn something new. The feedback is always super useful, and to any new comers to game development I recommend this game jam!


Phew! What a ride gm(48) is! I certaintly learned a ton from the jam, and it's inspired a game idea for me!

If you want be a better game developer in general, and spark some game ideas in your head, gm(48) is the place for you!


GM48's game jams are pretty challenging, as there are a lot of awesome and talented artists, designers and coders who participate in them.

Participate and level up your GameMaker skills

Receive constructive criticism and insights into how others perceive and play your games.

Become better at game design, game development and GameMaker Studio 2 by participating in our GameMaker community game jam.

Join the best GameMaker game jam Community

The gm(48) game jam is full of passionate, skillful and constructive developers, who would love nothing more than to share their experiences and feedback with you.

Share your games with other like-minded GameMaker Studio 2 developers, see and learn how they make their games, and become better developers together.

GameMaker Studio 2 Integrations

Games are better played together. Add social interactions to your game with these easy-to-install GameMaker scripts and watch how players compete, speedrun and interact with rest of the community.

gm48.net OAuth2 for GameMaker Studio 2
Add gm48.net account sign-in functionality to your game and recognize the player from other players.
gm48.net Leaderboards for GameMaker Studio 2
Add online leaderboards to your game, have your players submit their scores and display it all on gm48.net via your game's page.
gm48.net Achievements for GameMaker Studio 2
Add your own custom achievements to your game entry, have the players earn them and proudly display them on their gm48.net profile.
gm48.net Multiplayer for GameMaker Studio 2
Add online functionality to your game entry with dedicated server, user login and in-game chat using this easy-to-use library of scripts.

What would you develop?

It's never too late to get started with GameMaker Studio 2. Your next game could be one of these, so why not book a weekend for the game jam and see what you would create from scratch.

Use the game jam as a way to spark an idea from nothing to a playable prototype. Many developers use game jams to let loose their creativity and design crazy fun games.

Falling Apart

Papers & Dragons

Dragons are papers natural enemy, as they get on fire so easily. So archers and knight is saving kingdom from them!



Using your harpoon, defeat fish, collect upgrades, and find the sunken treasure!

One Shot

Eagle Eye Emma

Shoot your way to justice with Eagle Eye Emma in this wild, western adventure! How good is your aim?

Why Game Jams

Game jams are community events about making games set around a given theme within a time limit. By way of these constraints, your creativity and skill will be laser-focused on creating a game from nothing to something playable, and you gaining a ton of experience with your tools and constructive critcism from your fellow developers.

Don't get discouraged! Game jams can seem intimidating, and if they do, that's a good thing. That intimation will force you to work harder at becoming better. Watch this video by Shaun Spalding for tips on how to survive your first game jam. By the way, Shaun's game PokeyPoke was originally submitted to the 25th gm(48).

Why GameMaker Studio 2

Making games development accessible to everyone means taking away the barriers to getting started. GameMaker has everything you need to take your idea from concept to finished game.

Using the intuitive 'Drag and Drop' development environment you can have your game up and running in a matter of minutes without ever having to write any code! GameMaker's built-in language (GML) helps you learn to program as you go and not jump in at the deep end of coding.

GameMaker Studio 2 is simply perfect for game jams.

Try for free today!