This jam is now over. It ran from 2021-06-25 19:00:00 to 2021-06-30 19:00:00. View results

Hello there! This is a game jam where you have 5 days to make a game based on a preexisting IP. Your game also has to follow a certain theme, which will be announced when the jam starts.

The jam will be starting on the 25th of June at 12 PM PST, and ending 5 days later, on the 30th of June at 12 PM PST.

After the jam ends there will be a period where everyone can vote for the games submitted. The results and the winning games will get announced on the 5th of July.

This installment of the jam is also a bit special because in July we will be celebrating MFGG's 20th anniversary!

MFGG Main Site

Our Discord Server

Twitter Account

You can share your games on Twitter using the #MFGGJam hashtag if you want us to retweet your stuff.


And the theme is...


That's right, you will make a fangame that's not just based on one franchise, but two! How you do that is entirely up to you though, as long as 2 (or more) different game franchises are involved in some way it counts!

And before anyone asks, sub-franchises like Yoshi, Wario, and even Mario Kart count as separate franchises as well, at least for the purpose of this jam.


Who can enter? 

Anyone! You're even allowed to form teams, with a maximum of 5 people.

Does it have to be a Mario fangame?

Nope! Any fangame based on any franchise is welcome, and we are leaving the definition for "franchise" very open-ended. It could be a video game franchise, or it could be your favorite YouTuber. Up to you!

That being said, your game has to be a fangame of some sort. No original indie games are allowed.

But wait, what about Nintendo? Will I get sued?

I'd suggest you read this.

What assets can I use in my game?

You can make your own, or you can just use ones made by others and that are available to use. You can even use assets from commercial games, we are making fangames after all. 

Just make sure to give proper credit when needed, and state which assets you're using that you do not own.

What engine/tool do I have to use to make my game?

Doesn't matter. As long as your game is playable on a Windows system, you can use any game engine or framework. That being said, you can't base your game off of existing code. You can follow tutorials, but the base for your game should start development after the theme gets announced.

So basically, you can use game engines like Unity or GameMaker, but you can't just use frameworks like Hello Engine or Sonic Worlds.

Wait, so can it be a ROM hack?

Yeah, we do accept ROM hacks and mods! There are, however, some further restrictions with those.

  • The games should be fully playable on Windows PCs, with an emulator or otherwise.
  • The hacks and mods submitted should change more than just the game's graphics or music.
  • You should only submit the patch in case of hacks, submitting a ROM file will get you disqualified instantly.

Also, you have to keep in mind that the voting categories will be shared between all games, and ROM hacks tend to get far less attention compared to regular fangames in these fangame jams. So you will be at an immediate disadvantage, keep this in mind!

Can I remake/demake an existing game?

Nintendo doesn't like it when fans remake their games, so your game should be relatively original. A demake of Super Mario Galaxy is not okay, but a Super Mario Galaxy inspired fangame is.

This rule applies to non-Nintendo fangames as well, just to keep things fair.

Do I have to make an MFGG account? Do I have to submit the game to MFGG?

No, but it would be nice. :')

Where do you guys even discuss this?

Mainly on our Discord server, which can be found here.

Are there any other limitations?

  • Games submitted cannot contain nudity or sexually explicit themes.
  • Hateful language or any kind of harassment will also not be tolerated.
  • All games should be in English.
  • Games that contain excessive gore and violence should have warnings on their pages.
  • One person can be in multiple teams, but one person can only submit one game.
  • You can participate in two jams at once if they happen at the same time.


All submissions
Browser playable (2)
Windows (9)

No submissions match your filter

Mario + yoshi island =
Play in browser
Last Legacy gameplay in the world of Super Mario 63
Play in browser
The techs arrive at a game developer’s house with massive glitchy energy resulting in chaos
Buses, Impostors, endless desert, and Crazy music! What more could you possibly want?
The Blue Bomber takes on the Koopa King!
an epic treasure hunting adventure through the romance of the three kingdoms
Ness is trapped in a collapsed multiverse... Can you escape the clashing worlds of different Nintendo games?
Touhou fangame for the MFGG annual game jam 3.
A game where you evolve Goombas
An arcady Mario fangame
Nintendo Superstars team up in this action-packed rhythm game!
its my first game don't expect anything