Licenses & Credits

We build our games ourselves and keep a record of everything that comes from someone else. Here is that record.

Made by us

• All game code, the card/grid/board/arcade engines and site code — written for this site.
• Card faces and backs, mahjong tiles, dice, boards and pieces — drawn in CSS/SVG/canvas by our own code; no image assets.
• Sound effects — synthesized at runtime with the Web Audio API; no audio files.
• Puzzles (sudoku, nonograms, logic grids, mazes, levels) — generated by our own code or designed by us.
• Answer lists, themed word lists, typing passages and quiz questions — written by us.
• Icons — Unicode characters rendered with your device fonts.

Third-party software and data

• Vite (build tool; not shipped to browsers) — vitejs/vite. License: MIT. Source
• Validation word list (used only to accept player guesses in word games) — word-list npm package by Sindre Sorhus, derived from the atebits/Words list. License: MIT (package). TODO before launch: confirm the upstream atebits/Words list license.. Source
  License text

  MIT License — Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://sindresorhus.com). 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.

Game-specific credits

• Country outlines (Europe Map Quiz) — Natural Earth 1:50m Admin 0 countries (via the world-atlas package). License: Public domain. Source
  License text

  Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Borders are simplified and shown for learning only.

• Country outlines (Africa Map Quiz) — Natural Earth 1:50m Admin 0 countries (via the world-atlas package). License: Public domain. Source
  License text

  Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Borders are simplified and shown for learning only.

• Country outlines (Asia Map Quiz) — Natural Earth 1:50m Admin 0 countries (via the world-atlas package). License: Public domain. Source
  License text

  Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Borders are simplified and shown for learning only.

• Country outlines (South America Map Quiz) — Natural Earth 1:50m Admin 0 countries (via the world-atlas package). License: Public domain. Source
  License text

  Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Borders are simplified and shown for learning only.

• Civics questions and answers (2008 version) (US Citizenship Test Practice) — U.S. Citizenship and Immigration Services, civics (history and government) questions for the naturalization test. License: Public domain (work of the US government). Source
  License text

  Not an official USCIS product. Answers that change with elected officials are kept up to date by hand.

Trademarks

Game names on this site are generic descriptions of traditional or common game types. Any third-party trademarks belong to their owners; we are not affiliated with or endorsed by them.