| 2048 | Gabriele Cirulli | MIT | MIT (CSS-styled tiles, no image or audio assets) | Repository |
| A Dark Room | Michael Townsend (doublespeak games) and contributors | MPL-2.0 | MPL-2.0 (text and CSS only; the unlicensed music and sound files are not included) | Repository · Our source |
| Andromeda Invaders | Susam Pal | MIT | MIT (all graphics drawn on canvas, music and effects generated with Web Audio, no asset files) | Repository |
| Backgammon | Christopher Müller | MIT | MIT (board, checkers and dice drawn with CSS; no image or audio files) | Repository |
| Backspace: Return to Figadore | Jasper Renow-Clarke (picosonic) | MIT | MIT (3D models, SVG graphics and 14-segment font by the author); sound effects generated with jsfxr (Apache-2.0) | Repository |
| Backyard Slugger | Frank Force | MIT | MIT (ballpark, players and ball drawn in code, sound effects generated in code); Box2D physics under the zlib license | Repository |
| Bagh-Chal | Christopher Müller | MIT | MIT (board lines and pieces drawn with SVG and CSS, no image or audio files) | Repository |
| Bee Kind | Jasper Renow-Clarke (picosonic) | MIT | CC0 (Kenney Pixel Line Platformer tiles, edited by the author); music is the author's arrangement of a public-domain Strauss waltz (MIT) | Repository |
| Black Box Lasers | James Harvey (Simon Tatham's Portable Puzzle Collection) | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Black Hole Square | Quinten Clause | MIT | MIT (shapes drawn in code, sound made with Web Audio tones) | Repository |
| Block Code Duck Pond | Blockly Games by Google | Apache-2.0 | Apache-2.0 (Google); sounds by jorickhoofd (CC BY 4.0) and soundscalpel.com (CC BY 3.0); hit sound made for this site, CC0 | Repository |
| Block Code Maze | Blockly Games by Google | Apache-2.0 | Apache-2.0 (Google); win sound by grunz, CC BY 3.0; goal flag drawn for this site, CC0 | Repository |
| Block Code Music | Blockly Games by Google | Apache-2.0 | Apache-2.0 (Google); instrument samples CC BY 3.0 (FluidR3_GM via gleitz/midi-js-soundfonts; Salamander Grand Piano by Alexander Holm) | Repository |
| Block Code Turtle Art | Blockly Games by Google | Apache-2.0 | Apache-2.0 (Google); finish sound by Jlew, CC BY 3.0 | Repository |
| Block Drop | Jake Gordon | MIT | MIT (blocks drawn on canvas, no image, audio or font files) | Repository |
| Bounce Back | Frank Force | GPL-2.0 | GPL-2.0 (pixel art tile sheet by the author, ZzFX sound effects and music generated in code) | Repository |
| Brick Smash | Frank Force | MIT | MIT (bricks and paddle drawn in code, sounds generated in code; power-up icons use your device's emoji font) | Repository |
| Bridges Island Puzzle | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Brough Dungeon | Jeremiah Reid | MIT | MIT (pixel art sprites and Bfxr sound effects made by the author) | Repository |
| Bubble Pop Shooter | Frank Force | MIT | MIT (bubbles and effects drawn in code; sounds generated in code) | Repository |
| Bullet Hell Space Shooter | Amelia Clarke | MIT | MIT (ships drawn with code; no image or sound files). Uses p5.js 0.6.0, LGPL-2.1 | Repository |
| Bulls and Cows | Christopher Müller | MIT | MIT (shapes and pegs drawn as inline SVG and CSS, no image or audio files) | Repository |
| Bullseye Archery | Adnan Zawad Toky | MIT | MIT (bow, arrows and target drawn in code; no image or audio files) | Repository |
| Can't Get Back | Kipkat | MIT | MIT (graphics drawn in code, ZzFX sound effects and music generated in code) | Repository |
| Canvas Tower Defense | Teddy Cross | MIT | MIT (author-made turret, map and logo images; no audio) | Repository |
| Checkers | Christopher Müller | MIT | MIT (board and pieces drawn with CSS, no image or audio files) | Repository |
| Chess vs Computer | Zhang Zeyu | MIT | CC BY-SA 3.0 (chess piece images by Cburnett, Wikimedia Commons); chessboard.js, jQuery and Bootstrap are MIT; chess.js is BSD-2-Clause | Repository |
| City Shield | Frank Force | MIT | MIT (city skyline, cannons and effects drawn in code; sounds generated in code) | Repository |
| Coding Golf | Jasper Renow-Clarke (picosonic) | MIT | MIT (course and pixel font drawn in code by the author); club and flag models converted from Kenney's Minigolf Kit (CC0) | Repository |
| Coil | Hakim El Hattab | MIT | MIT (orbs, trail and text drawn in code; background and grid texture images included in the MIT-licensed repository) | Repository |
| Color Pour Sort | Gedas-S | AGPL-3.0 | AGPL-3.0 (tubes and liquid drawn with CSS; no image or audio files after our changes) | Repository · Our source |
| Color Tile Match | Alexander Bazhanov | MIT | MIT (tiles drawn on canvas, inline SVG icons from Material Symbols under Apache-2.0, no audio) | Repository |
| Compact Conflict | Jakub Wasilewski | Zlib | Zlib (map, temples and soldiers drawn with HTML and CSS; sound effects generated in code) | Repository |
| Complements | Frank Force | MIT | MIT (gems and board drawn in code; sound effects generated in code) | Repository |
| Crater Space | Jasper Renow-Clarke (picosonic) | MIT | CC0 (ship and missile sprites based on Kenney Space Shooter Extension); craters and text drawn in code (MIT) | Repository |
| CSS Diner | Luke Pacholski (flukeout) | MPL-2.0 | MPL-2.0 (table items styled with CSS by the author); Exo 2 font under SIL OFL 1.1, Satisfy font under Apache 2.0 | Repository · Our source |
| CSS Grid Carrot Patch | Thomas Park | MIT | MIT (garden, carrot and weed drawings by the author); PT Sans, Autour One and Source Code Pro fonts under SIL OFL 1.1 | Repository |
| Dominoes | Christopher Müller | MIT | MIT (tiles drawn with SVG and CSS, no image or audio files) | Repository |
| Dominosa Domino Logic | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Dots and Boxes | Christopher Müller | MIT | MIT (grid, lines and marks drawn with HTML and CSS, no image or audio files) | Repository |
| Downhill Ski | Frank Force | MIT | MIT (skier, trees, rocks and ramps drawn in code; sound effects generated in code) | Repository |
| Durak | Christopher Müller | MIT | MIT (cards drawn with CSS and inline SVG suit shapes, no image or audio files) | Repository |
| Egg Time Rewind | Frank Force | GPL-2.0 | GPL-2.0 (tiles.png and font.png pixel art from the same repo; sound effects generated in code) | Repository · Our source |
| Elematter | Jack Rugile | MIT | MIT (shapes drawn with HTML and CSS; sound effects generated in code with jsfxr, Apache-2.0) | Repository |
| Elevator Saga | Magnus Wolffelt and contributors | MIT | MIT (graphics drawn with HTML and CSS); Font Awesome 4.1 icons under SIL OFL 1.1 | Repository |
| Emoji Horde | Frank Force | MIT | CC-BY 4.0 (Twemoji emoji art by Twitter, Inc and contributors); other graphics and ZzFX sounds generated in MIT code | Repository |
| Escape the Catacombs | Santi Herranz | MIT | MIT (all graphics drawn in code, ZzFX sound effects) | Repository |
| Evolving Civilization | Peter Motschmann (Demagorddon) | MPL-2.0 | MPL-2.0 (text and CSS interface); Weather Icons font under SIL OFL 1.1 | Repository · Our source |
| Factors Game | Michael P. Nitowski | MIT | MIT (all graphics drawn on canvas in code, no image or audio assets) | Repository |
| Fanorona | Christopher Müller | MIT | MIT (board lines and pieces drawn with SVG and CSS, no image or audio files) | Repository |
| Fifteen Slide | Alexander Bazhanov | MIT | MIT (CSS-drawn 3D blocks, no audio); Material Design Icons font under SIL OFL 1.1 | Repository |
| Five Dice Scorecard | Christopher Müller | MIT | MIT (dice and scoresheet drawn with CSS and inline SVG, no image or audio files) | Repository |
| Five-Square Tiling Puzzle | Christopher Müller | MIT | MIT (pieces and board drawn as inline SVG and CSS in code, no image or audio files) | Repository |
| Fleet Strike | Bill Mei | MIT | MIT (author's own small marker icons; grids drawn with CSS, no audio) | Repository |
| Flexbox Lily Pond | Thomas Park | MIT | MIT (frog and lily pad drawings by the author); PT Sans, Fredoka One and Source Code Pro fonts under SIL OFL 1.1 | Repository |
| Flood Fill Puzzle | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Four in a Row | Christopher Müller | MIT | MIT (grid and discs drawn with CSS, no image or audio files) | Repository |
| Fox and Geese | Christopher Müller | MIT | MIT (board lines and pieces drawn with SVG and CSS, no image or audio files) | Repository |
| Free Throw Frenzy | Frank Force | MIT | MIT (court, ball and hoop drawn in code, ZzFX and generated sound effects) | Repository |
| FreeCell Solitaire | Christopher Müller | MIT | MIT (cards drawn in code with text ranks and inline SVG suits; no image or audio files) | Repository |
| Galaxies Symmetry Puzzle | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Game of the Amazons | Christopher Müller | MIT | MIT (board, pieces and burned squares drawn with HTML and CSS, no image or audio files) | Repository |
| Go | Christopher Müller | MIT | MIT (grid, star points and stones drawn with CSS, no image or audio files) | Repository |
| Golden Apple Snake | Frank Force | MIT | MIT (snake, apples and board drawn in code; sounds generated in code) | Repository |
| Gomoku | Christopher Müller | MIT | MIT (grid and stones drawn with CSS, no image or audio files) | Repository |
| Gravity Golf | eschatonic | MIT | MIT (planets, ball and path drawn as canvas lines; no image or audio files) | Repository |
| Greater-Than Grid | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Hel's Trial | Sebastian Dorn | MIT | MIT (pixel art by the author; ZzFX sound effects generated in code) | Repository |
| Hex | Christopher Müller | MIT | MIT (hexagon cells and stones drawn with CSS, no image or audio files) | Repository |
| Hex Formation | Mason Blier | MIT | MIT (all graphics drawn in code on canvas; no image or audio files) | Repository |
| Hextris | Logan Engstrom, Garrett Finucane, Noah Moroze, Michael Yang | GPL-3.0 | GPL-3.0 (the team's own SVG buttons; Exo 2 and Font Awesome fonts under SIL OFL 1.1) | Repository · Our source |
| Highway Pursuit | Frank Force | MIT | MIT (cars, road and scenery drawn in code, sounds generated at runtime) | Repository |
| Hnefatafl | Christopher Müller | MIT | MIT (board squares and pieces drawn with CSS, no image or audio files) | Repository |
| Hop Across | Frank Force | MIT | MIT (frog, cars, logs and lily pads drawn in code, sound effects generated at runtime) | Repository |
| Hue Jumper | Frank Force | GPL-3.0 | GPL-3.0 (no asset files; all graphics drawn with canvas code, no audio) | Repository |
| Humwin & Darbold | Markus Fisch | Unlicense | Unlicense (all sprites are SVG drawings by the author inside the game file; no audio) | Repository |
| Hurry Cave Shooter | Hugh Kennedy | MIT | MIT (text and number images made by the author; no audio) | Repository |
| Hyperspace Garbage Collection | Raymond Zhou (razh) | MIT | MIT (all graphics drawn in code; plays without sound) | Repository |
| Inertia Gem Slide | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Infinite Cars | Takane Ichinose | GPL-3.0 | GPL-3.0 (pixel art and sound effects made by the author); Luckiest Guy font under Apache 2.0 | Repository · Our source |
| IsoCity | Victor Ribeiro | MIT | CC0 (isometric city and building tiles by Kenney, kenney.nl) | Repository |
| Jetdash | Frank Force | MIT | MIT (pilot, hazards and coins drawn in code; sound effects generated in code) | Repository |
| Klondike Solitaire | Christopher Müller | MIT | MIT (cards drawn in code with text ranks and inline SVG suits; no image or audio files) | Repository |
| Konane | Christopher Müller | MIT | MIT (board and stones drawn with HTML and CSS, no image or audio files) | Repository |
| Learn Git Branching | Peter Cottle | MIT | MIT (graphics drawn in code); Font Awesome icons, CC BY 4.0 / CC BY 3.0, fonts SIL OFL 1.1 | Repository |
| Light Switch Grid | Tejas Wavde | MIT | MIT (CSS-styled cells and an SVG favicon, no images, fonts or audio) | Repository |
| Light Up Lamp Puzzle | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Little Platformer | Frank Force | MIT | MIT (tiles.png and tilesLevel.png from the LittleJS repo; sounds generated with ZzFX in code) | Repository |
| Logic Mines | Paweł Marczewski | MIT | MIT (the author's own SVG sprites; Bootstrap 4.3.1 and long-press-event, both MIT) | Repository |
| Loopy Loop Puzzle | Mike Pinna, Lambros Lambrou and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Lost City of S | Markus Fisch | Unlicense | Unlicense (public domain; all sprites are inline SVG drawn by the author, no sound) | Repository |
| Lost Treasures | Markus Fisch | Unlicense | Unlicense (all 3D models and the seabed are generated in code; matrix helpers from gl-matrix, MIT) | Repository |
| Ludo | Christopher Müller | MIT | MIT (board and token shapes drawn with CSS and inline SVG, no image or audio files) | Repository |
| Magnet Dominoes | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Mahjong Solitaire | CTBot000 | MIT | MIT (tile faces drawn as SVG in code, sounds synthesized in the browser) | Repository |
| Mancala | moparisthebest | AGPL-3.0-or-later | AGPL-3.0-or-later (author's own icon; board and seeds drawn with HTML and CSS, no audio) | Repository · Our source |
| Marble Spiral | Frank Force | MIT | MIT (spiral, marbles and turret drawn in code; sound effects generated in code) | Repository |
| Math Cage Grid | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Math Sprint Game | Amey Thakur & Mega Satish | MIT | MIT (background art by the authors; Play font under SIL OFL 1.1; sounds generated in code) | Repository |
| Memory Pairs | Tejas Wavde | MIT | MIT (CSS-styled cards); card pictures use the bundled Twemoji font, CC-BY 4.0 by Twitter, Inc and contributors | Repository |
| Mini Grand Prix | hexinhao (xhhdaxx) | MIT | MIT (cars and tracks drawn in code, no audio); world map data from Natural Earth, public domain | Repository |
| Mini Putt Park | Frank Force | MIT | MIT (course art drawn in code, sound effects generated in code); Box2D physics under the zlib license | Repository |
| Mole Bonk | Christopher Scott Hernandez | MIT | MIT (mole and button artwork drawn by the author, per the README) | Repository |
| Moon Lander | Frank Force | MIT | MIT (lander, terrain and planet drawn in code; sound effects generated in code) | Repository |
| Net Pipe Puzzle | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Netslide Pipe Puzzle | Richard Boulton and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Nine Men's Morris | Christopher Müller | MIT | MIT (board lines, points and pieces drawn with CSS, no image or audio files) | Repository |
| Norman the Necromancer | Dan Prince | Unlicense | Unlicense (pixel sprites and font by the author; music and sound effects synthesized in code) | Repository |
| Number Path | Tejas Wavde | MIT | MIT (grid and path drawn with HTML, CSS and SVG; no image or audio files) | Repository |
| OnOff | Daniel Marino and Brad Dunbar | MIT | MIT (SVG shapes drawn in code; music and effects played through the MIT TinyMusic library) | Repository |
| OrbitSwarm | Frank Force | MIT | MIT (planets, ships and starfield drawn in code; no sound) | Repository |
| Paddle Duel | Frank Force | MIT | MIT (paddles, ball and CRT screen effect drawn in code, sound effects generated at runtime) | Repository |
| Pearl Loop Puzzle | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Peg Solitaire | Christopher Müller | MIT | MIT (board and pegs drawn with CSS, no image or audio files) | Repository |
| Pegball | Frank Force | MIT | MIT (pegs, ball, cannon and bucket drawn in code; sound effects generated in code) | Repository |
| Penalty Kick Showdown | Carlos Sardo & Diogo Sardo | MIT | MIT (pixel art drawn in code, music and sound effects made with the Web Audio API); Press Start 2P font under SIL OFL 1.1 | Repository |
| Pinball | Frank Force | MIT | MIT (table drawn in code; sound effects generated in code); Box2D physics build under the zlib license | Repository |
| Pipe Flapper | Frank Force | MIT | MIT (bird, pipes and scenery drawn in code from simple shapes, sound effects generated at runtime) | Repository |
| Pixel Sketch Studio | gitstq | MIT | MIT (interface icons are inline SVG in the code; no image, font or audio files) | Repository |
| Planet Protector | Frank Force | MIT | MIT (ships, aliens and terrain drawn in code; sounds generated in code) | Repository |
| Pocket Pool | Frank Force | MIT | MIT (table and balls drawn in code, ZzFX sound effects); Box2D physics under the zlib license | Repository |
| PoliGuard | Ion Mateus | MIT | MIT (shapes drawn in code; emoji icons come from your system font) | Repository |
| Powerwing | Frank Force | MIT | MIT (ships, enemies and terrain drawn in code; sound effects generated in code) | Repository |
| Prestige Tree Rewritten | Jacorb | MIT | MIT (CSS and canvas visuals; achievement pictures removed) | Repository |
| Princess of Corinium | Jasper Renow-Clarke (picosonic) | MIT | CC0 (Kenney Tiny Town and Tiny Dungeon tiles); pixel font by the author (MIT) | Repository |
| Progress Knight | Ihtasham42 | Unlicense | Public domain (text and CSS interface only, no image or audio files) | Repository |
| Pyramid Solitaire | Christopher Müller | MIT | MIT (cards drawn with CSS and text suit symbols, no image or audio files) | Repository |
| Radius Raid | Jack Rugile | MIT | MIT (shapes drawn in code; sound effects generated with JSFXR, Apache-2.0) | Repository |
| Range Shading Puzzle | Jonas Kölker and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Realm of Ages Clicker | Sam | GPL-3.0 | GPL-3.0 (text and CSS interface, no image or audio files) | Repository · Our source |
| Red Rock Descent | StarKnightt | ISC | ISC (cars, terrain, interface and sound are all generated in code; three.js library under MIT) | Repository |
| River Strike | Frank Force | MIT | MIT (shapes drawn in code, sounds generated in code) | Repository |
| Robot Coder | Schnark | Apache-2.0 | Apache-2.0 (SVG tiles by the author, icons derived from Material Design Icons under Apache-2.0, synthesized sound effects) | Repository |
| Rock Blaster | Frank Force | MIT | MIT (vector shapes drawn in code, sound effects generated in code) | Repository |
| Royal Game of Ur | Christopher Müller | MIT | MIT (board, rosettes, pieces and dice drawn with CSS, no image or audio files) | Repository |
| Same Game Blocks | James Harvey (Simon Tatham's Portable Puzzle Collection) | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Senet | Christopher Müller | MIT | MIT (track, special squares, pieces and sticks drawn with CSS, no image or audio files) | Repository |
| Shogi | Christopher Müller | MIT | Board and piece shapes: MIT. Piece kanji: CC BY 4.0, adapted by Christopher Müller from the kanji_light shogi piece set by Kadagaden (github.com/Kadagaden/shogi-pieces) | Repository |
| Signpost Arrow Chain | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Sky Hop | Frank Force | MIT | MIT (ball and platforms drawn in code from simple shapes, sound effects generated at runtime) | Repository |
| Skyscraper Sightlines | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Slant Diagonals | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Snakes and Ladders | Christopher Müller | MIT | MIT (board, snakes and ladders drawn with SVG and CSS, no image or audio files) | Repository |
| SpacePi | Jack Rugile | MIT | MIT (no image or sound files; everything is drawn in code) | Repository |
| Speedway Sprint | Frank Force | MIT | MIT (car, road and scenery drawn in code, sound effects generated at runtime) | Repository |
| Spider Solitaire | Christopher Müller | MIT | MIT (cards drawn in code with text ranks and inline SVG suits; no image or audio files) | Repository |
| SQL Detective Mystery | NUKnightLab (Joon Park, Cathy He, Joe Germuska) | MIT | CC BY-SA 4.0 (case text and database content); sql.js and CodeMirror, MIT | Repository |
| Star Halma | Christopher Müller | MIT | MIT (star board and marbles drawn with HTML and CSS, no image or audio files) | Repository |
| Stolen Sword | Ian Chiao | MIT | MIT (no image or audio files; everything is drawn in code and sounds use the ZzFX synth) | Repository |
| Strike Lane Bowling | isocialPractice | MIT | MIT (lane and HUD drawn in code; ball and pin 3D models included in the repository; three.js under MIT) | Repository |
| Sudoku Flow | Bharani Kumar S | MIT | MIT (no image or audio files; sounds made in the browser; canvas-confetti library under ISC) | Repository |
| Surakarta | Christopher Müller | MIT | MIT (board, loop arcs and stones drawn with SVG and CSS, no image or audio files) | Repository |
| Tangram | Christopher Müller | MIT | MIT (pieces and outlines drawn as inline SVG in code, no image or audio files) | Repository |
| Tank Ricochet | Frank Force | MIT | MIT (3D models, textures and sound effects are generated in code) | Repository |
| Tents and Trees Puzzle | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| The Great Train Robbery | Ondřej Žára | MIT | MIT (text-mode graphics drawn in code), Cascadia Mono font by Microsoft under OFL-1.1 | Repository |
| The Reapers: Tournament of Destiny | Kilian Arjona and Valeria Sivkova | Apache-2.0 | Apache-2.0 (pixel art and ZzFX sound effects by Valeria Sivkova; Tinyfont, MIT) | Repository |
| The Sunshine Policy | Markus Fisch | Unlicense | Unlicense (public domain; all scenes and characters are inline SVG drawn by the author, no sound) | Repository |
| Tiny Synth Piano | Frank Force | GPL-3.0 | GPL-3.0 (all sound synthesized with the Web Audio API, no image or audio files) | Repository · Our source |
| Tiny Track Racer | Frank Force | MIT | MIT (cars and terrain drawn in code, sounds generated at runtime); Box2D physics under the zlib license | Repository |
| Tower of Hanoi | Douile | MIT | MIT (rings and pegs drawn in code; Feather icons, MIT) | Repository |
| Train Track Logic | James Harvey and Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Typer Defense | Berk Erol | GPL-3.0 | GPL-3.0 (letters and effects drawn on canvas, no image or audio files) | Repository · Our source |
| Undead Mirror Maze | Steffen Bauer (Simon Tatham's Portable Puzzle Collection) | MIT | MIT (monster pictures and all other graphics are drawn by the game code; no images or audio) | Repository |
| Unicorns Off My Lawn | Michel Sabchuk | MIT | MIT (all art drawn in code from the author's own vector paths; music and sounds generated in code) | Repository |
| Universal Reversi | Norbert Nopper | MIT | MIT (board and discs drawn with CSS, no image or audio files) | Repository |
| Unruly Black and White | Lennard Sprong (Simon Tatham's Portable Puzzle Collection) | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Untangle Lines | Simon Tatham | MIT | MIT (all graphics are drawn by the game code; no images or audio) | Repository |
| Warden's Duty | Ondřej Žára | ISC | ISC (text glyphs and CSS only, no image or audio files); rot.js library under BSD-3-Clause | Repository |
| Word Search | Bill (BunKat LLC) and Lucas-C | MIT | MIT (HTML and CSS only, no image or audio assets; bundled jQuery 1.7.1 under MIT) | Repository |
| Xiangqi | Christopher Müller | MIT | Board and character pieces: MIT. Optional symbol pieces: CC BY 4.0, adapted by Christopher Müller from Kadagaden's xiangqi_wikipedia_intl_modded set (github.com/Kadagaden/chess-pieces), itself modified from Wikimedia Commons drawings by Inductiveload (public domain per Commons; listed as CC BY-SA in the PaperGames notice) | Repository |
