This jam is now over. It ran from 2021-02-13 15:00:00 to 2021-03-14 15:00:00. View results


Magical Girls! Don't you love this genre about girls with magical powers fighting against evil?

Well, welcome to Magical Girl Game Jam #3!!

Seeing how much people enjoyed the previous two jams, I have decided I would like to see people make more games about Magical Girls again this time.

Discord server:


For this jam, Magical Girl Game Jam will have a test collaboration with the Visual Novel community Devtalk. If you're interested, please do check them out:


As much as I want this jam to be as unrestricted as possible, there are some rules that I have decided to put in place:

  • Put at least one magical girl character in your game -- it can be your main character, the enemy, anythingCreating an original character is strongly encouraged. Magical Girls being defined as "girls with magical powers" as the bare minimum. As for "magical powers", for the purpose of this jam the bare minimum is for you as  the author to declare her power as magical and for her power to not happen in the real world.
  • Properly pick a theme and follow it
  • Keep NSFW materials away from your game. Because so many have decided to ask specifically the boundaries, I have put the boundaries here:
    • Boundaries for nudity:
      • Definitely safe: up to standard bikinis (see image 1)
      • Gray area (your game will be at the mercy of my subjectivity): the more revealing bikinis, lingeries -- when I consider the intention to be s*x and nudity-focused it may get removed depending on context.
      • Definitely out: n*ppl*s and genitals
    • Boundaries for violence:
      • Definitely safe: uncensored red blood
      • Probably safe: decapitations, severed limbs -- probably add some warnings if your game has this
      • Definitely out: graphic depictions of innards (e.g.: beating heart getting ripped out of someone's chest and then getting squashed, intestines coming out of someone's stomach into the floor, brain getting splattered everywhere)
  • The game has to be free to play upon submission
  • Unfinished games are OK
  • You are free to use any assets you have legal access to
  • Respect the unwritten rules for game jams in general:
    • Submit games that are made for the sake of this jam
    • Keep toxicity away from this jam... or any jam for that matter
    • etc.
  • Have fun! :)

Hashtags: #MGGJ #MGGJ3

(Image 1: reference as the bare minimum clothing your girls need to have before them being at the mercy of my subjectivity)

This is the bare minimum clothing your characters need for it to be objectively considered safe and not at the mercy of my subjectivity -- if your chars have more clothings than that, you are definitely safe. However, I will prefer it if your girl has more than this.


The followings are the themes for MGGJ3. Take a theme and make a game out of it until March 15th 2021 (JST).

  1. Nuclear Energy
  2. Schrödinger's Cat/Superposition
  3. Wave and Particle Duality
  4. Spacetime Curvature/Time Dilation/Length Contraction/Relativity
  5. Spooky action at a Distance/Quantum Entanglement
  6. Uncertainty Principle
  7. Conservation of Energy

komeiji satori, reiuji utsuho, and kaenbyou rin (touhou) drawn by urin |  Danbooru

(Image used as hint for the themes)

(Picture from before the theme reveal, posted as a hint to three of the themes)


To interpret any theme, it is sufficient to take a word that's Capitalized and make a game based on that word (e.g. "Cat" is a valid interpretation but "action" is not). Of course however, direct proper interpretations and also literal interpretations of any theme as a whole are also allowed

Proper scientific meanings of the themes:

Since the themes aren't things everybody is familiar with this time, thanks to a feedback, I have decided to give a brief explanation to the proper scientific meanings of each of the themes are (hopefully I don't get any of these wrong):

  1. Nuclear Energy: Energy of atomic nucleus. Nuclear fission refers to splitting of (large) atoms (like Uranium-235 or Plutonium-239) and nuclear fusion refers to merging of (small) atoms into bigger ones (like Deuterium + Tritium becoming Helium). Big atoms release energy when they split and small atoms release energy when they combine.
  2. Schrödinger's Cat/Superposition: Superposition refers to summation of two vectors, but in the quantum world this can be interpreted as two states happening at the same time until observed. Schrödinger's Cat is a thought experiment about Superposition turned into a macro level where a cat in a box is alive and dead at the same time (until the superposition collapse when you open the box)
  3. Wave and Particle Duality: In the quantum world, small stuffs behave as both a wave and a particle -- they have properties of both a wave and a particle. A famous experiment demonstrating it is the double slit experiment: when individual photons are shot through a double slit, it is observed that although ultimately only one individual photon goes through the slit, it behaves as if it were a wave going through a slit that then collapses when observed. Closely related to superposition.
  4. Spacetime Curvature/Time Dilation/Length Contraction/Relativity: The speed of light is the fastest speed cause and effect and information can travel through space, and the speed of light is the same for all perspectives without acceleration -- the speed of light for someone floating around in space is exactly the same as the speed of light "c" for someone in a rocket ship moving at 0.99c relative to the floating around in space observer. The speed of light is constant, and it turns out it's space and time that changes with velocity. Einstein then came to the conclusion that from the perspective of the floating person, the clock of the rocket person is slower (time dilation) and the length of the rocket much shorter (length contraction). This is called Special Relativity. Spacetime curvature a related concept also by Einstein in the theory of General Relativity that gravity is not a force but a result of spacetime curving -- our perspective is the same as a rocket accelerating constantly at 9.8m/s² and it's free falling objects that are "not accelerating". Also worth noting that time moves slower near large gravitational fields.
  5. Spooky action at a Distance/Quantum Entanglement: Two particles can be entangled -- in such state when for example one particle takes one state, the other necessarily takes the other state. If those two particles are then separated by great distance, then measuring one will still collapse the superposition of the other even if the other particle is now light years away -- information now appears to travel faster than light. Einstein didn't like this idea and called it "Spooky action at a distance". Theoretical teleportation is said to be able to be performed by exploiting this concept.
  6. (Heisenberg's) Uncertainty Principle: TL;DR there is a limit to how precise you can measure for example the position and velocity of an object. The more precise you measure position the less precise you can measure velocity and vise versa. A good illustration is a wave: when you measure the wave as a short pulse you know where exactly the wave is, but measuring the frequency of a short pulse is nonsense. On the other hand you can take longer sample and know the frequency better, but now the position of the wave is nonsense. Closely related to wave and particle duality and also demonstrated with the double slit experiment.
  7. Conservation of Energy: The first law of thermodynamics. Energy is not created or destroyed, it just changes form, from nuclear to heat, from mechanical to kinetic, etc.

7th theme:

There were originally only 6 themes. But because the themes got guessed so rapidly, I had to add a 7th theme just so there could be a reason to still wait no matter how small. The 7th theme was determined via voting, and these were the theme candidates.

  1. Entropy
  2. Conservation of Energy
  3. Strangeness
  4. Antimatter
  5. Electromagnetism
  6. Island of Stability

The themes "Conservation of Energy" and "Strangeness" got the same amount of most votes -- however, chose Conservation of Energy and therefore Conservation of Energy was chosen as the 7th theme.


Your submissions will be rated publicly like based on the following criteria.

  • Magical Girl Concept
    • How creative are the magical girl ideas in the game?
    • Changed from "Magical Girl Design" from MGGJ2
  • Engagement/Fun
    • Duh. How fun the gameplay/story is
  • Originality/Creativity
    • The creativity of the gameplay mechanics primarily
  • Graphics, Audio, and Polish
    • How polished the game is. Does it have good graphic? Does the game give good feedback to the player? Aim for quality over quantity
  • Theme Interpretation
    • How well and creatively are the themes interpreted
    • I hope with this rating criteria 'petty' interpretations are more discouraged; where the themes are interpreted into a concept that is basic to any game or anything Magical Girl related.
  • Overall

What is a Magical Girl?

Some people unexpectedly joined the jam without knowing what the Magical Girl genre is in the first jam, so from MGGJ2 onwards, I decided to put this section to explain a bit about what the Magical Girl genre is.

To put it simply, the Magical Girl genre, or Mahō Shōjo (魔法少女) in Japanese, is a genre about cute girls having cute magical powers -- often associated with anime, manga, and other Japanese works. In my own personal opinions, some primary characteristics of the Magical Girl genre are:

  1. Cute girl with magical powers.
  2. Cute dresses -- not always though... some Magical Girls go the elegant route while others go the wild route
  3. Transformation sequence -- not always but I think most do have it
  4. Fighting against evil powers -- be it witches, aliens, or whatever

If I need to emphasize this more, this is just my own opinion, not strict guidelines. Feel free to subvert or deviate from my expectations, but make a Magical Girl.

Some examples of Magical Girl works:

  • Puella Magi Madoka Magica
    • A veeery cute one. The cutest, most cheerful of all Magical Girl shows.  A complete masterpiece. I recommend this one very strongly

Puella Magi Madoka Magica (Anime) - TV Tropes

  • Sailor Moon

VIZ | The Official Website for Sailor Moon

  • Pretty Cure

Pretty Cure Name Meanings - YouTube

  • Minky Momo

Magical Princess Minky Momo- by Kunihiko Yuyama | Aesthetic anime ...

If you are previously not familiar with the Magical Girl genre, I hope this explanation at least gives you a vague idea of what you should be aiming for.

For more information, you can check the TV Tropes page for it. While to avoid removal it is enough to fulfill the definition "girls with magical powers", I want you to aim for TV Tropes's Magical Girls


All submissions
Browser playable (22)
Windows (26)
macOS (12)
Linux (8)
Yes (16)
No (29)
No (15)
Yes (30)

No submissions match your filter

A cute surrealist horror.
Role Playing
Paisley has been kidnapped on Valentine's Day! Tama's on the rescue, but is she ready for what comes next?
Play in browser
a casual, slice-of-life game about a magical boy and his almost-but-not-yet boyfriend!
Visual Novel
Defend your home against creatures attacking your garden!
Play in browser
Magic and science. Past and future. But what of the present?
Visual Novel
Play in browser
2D Adventure Platformer
Play in browser
A simple click and result magical girl maker.
Play in browser
A magical girl themed roguelike designed for phone or mouse and keyboard. Created in MegaZeux
Role Playing
Play in browser
2D Top Down Horror Adventure
Lions tigers, and... sea pineapples?! Oh my! A short visual novel with light arcade gameplay.
Play in browser
A danmaku/bullet hell shooter with magical girls.
Play in browser
Short visual novel featuring mysterious plant life and missing school girls.
Visual Novel
Play in browser
Blood for strength. Strength for blood. Fight for your lives.
Role Playing
Monsters are attacking the kingdom of Yternis and it's up to one magical girl to stop them. Created with MegaZeux.
Play in browser
Bullet Hell with Magic Girls fighting to protect the forest
Play in browser
A simple to play magical girls RPG spiced with powers that came as a result of a failed nuclear bomb test.
Story-based bullet-hell dungeon crawler with a time travel based plot.
A jam game about twin magical girls.
Visual Novel
A magical princess girl 3d platformer
Life isn't easy when you're a nuclear-powered magical girl, but it is certainly very explosive
What in the--
Role Playing
Short high-score-based shmup where you survive 25 rounds.
A visual novel about a magical girl, a wizard, and a capybara
Visual Novel
A magical girl of light fights against creepy DEAD ZONES, but not all is as it seems
Play in browser
Race against time to save it.
Visual Novel
Top Down Magical Girl Shooter
Play in browser
A game, where you need to punch mouses to leave the box
Card Game
Play in browser
Magical Girl RPG with a rhythm battle system
Role Playing
Play in browser
Magical Girl edition
Play in browser
Enemies are coming! Command magical girls to defend the city!
Play in browser
Slice of Life?
Play in browser
Play as Bricco in an epic platformer
Play in browser
Rescue your people from the monsters and regain your magic!
Role Playing
Play in browser
Noble ladies with swords and magic, IN SPACE!
With the control of time and the wind, it's up to you to protect the world
Become a Magical Girl and battle against an alien invasion in this shmup arcade inspired game with bullet hell action.
Play in browser
Submission for the Magical Girl Game Jam #3
Role Playing
Play in browser