Licenses
Last updated: September 19, 2026
MaMills and this website are built on open-source software and freely licensed fonts and music. Everything used is credited below; the MIT and Open Font licenses are reproduced in full, and the others are named and linked. The game carries its own copy of this list under Settings → About → Licenses, covering what ships inside the game; the Godot notice there is generated live, so it always matches the build you are running. This page additionally covers the fonts and media used by the website and the trailer.
Game engine
Godot Engine 4.7
Copyright © 2014-present Godot Engine contributors. Copyright © 2007-2014 Juan Linietsky, Ariel Manzur.
Steam integration
GodotSteam 4.19
Copyright (c) 2015-Current | GP Garcia, Chris Ridenour, and Contributors
Steamworks SDK
© Valve Corporation.
Platform marks
Steam Deck logo
©2021 Valve Corporation. Steam, the Steam logo, Steam Deck and the Steam Deck logo are trademarks and/or registered trademarks of Valve Corporation in the U.S. and/or other countries. All rights reserved.
Tux, and the Apple mark
Icons from Simple Icons, released under CC0 1.0.
Windows mark
Icon from Font Awesome Free 6, © Fonticons, Inc., under CC BY 4.0.
Made with AI tools
AI tools helped design and build this website and make its artwork, including the crest, the duck mascot and the studio intro video. The MaMills trailer and screenshots are captured from the game, and its computer opponent, the Machine, is classic board-game logic, not generative AI.
Music
"Deliberate Thought" - Kevin MacLeod
Kevin MacLeod (incompetech.com)
"Wholesome" - Kevin MacLeod
Kevin MacLeod (incompetech.com)
Fonts
All four are licensed under the SIL Open Font License, Version 1.1. The licence asks that its text travel with the font files, so a copy of it sits beside them as assets/fonts/OFL.txt, naming each project and its copyright line; the full text is reproduced further down this page as well. The three web fonts are subsets - Fraunces to the five letters of the wordmark alone - which the licence permits, and none of them is renamed or distributed under a reserved font name.
Fraunces
Copyright 2020 The Fraunces Project Authors (github.com/undercasetype/Fraunces)
Atkinson Hyperlegible
Copyright 2020 Braille Institute of America, Inc.
Inter
Copyright 2016 The Inter Project Authors (github.com/rsms/inter)
Libre Baskerville
Copyright 2012 The Libre Baskerville Project Authors (github.com/impallari/Libre-Baskerville)
License texts
MIT License - Godot Engine, GodotSteam
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
SIL Open Font License, Version 1.1 - all four fonts
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 PREAMBLE The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others. The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives. DEFINITIONS "Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation. "Reserved Font Name" refers to any names specified as such after the copyright statement(s). "Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s). "Modified Version" refers to any derivative made by adding to, deleting, or substituting -- in part or in whole -- any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment. "Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software. PERMISSION & CONDITIONS Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions: 1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself. 2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user. 3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users. 4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission. 5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software. TERMINATION This license becomes null and void if any of the above conditions are not met. DISCLAIMER THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.
Everything else
The MaMills name, artwork, sound effects, and the Department of Ducks crest are © 2026 Department of Ducks and are not covered by the licenses above. See the Terms.
Think something is missing or credited wrongly? Please contact us - we will fix it.