NumPlay

29 free games for your NumWorks calculator, in one app.
Plus 20 big games that install on their own. For the N0110, N0115 and N0120, in English, French and Chinese.

Make your own NumPlay in NumPlay Studio

How to install · How to play · All downloads · What's new · Roadmap · Make a game

⭐ Enjoying NumPlay? Give it a star at the top of this page: it takes a second and helps other people find it.
💡 Want a game that isn't here? Check the roadmap first, then email me at masonchen204@gmail.com.

Games in NumPlay

All of these come in one app, NumPlay.nwa.

NumDash	Crossy Road	NumBlocks	NumDrive	Balatro
Buckshot Roulette	Block Blast	Suika Game	Portal Returns	Tetris
Chrome Dino	Doodle Jump	Chess	Flappy Bird	Flappy Dunk
Tower Blocks	Core Ball	Pac-Man	Snake	Connect Four
Solitaire	2048	Minesweeper	Block Breaker	2 Players
Space Invaders	Sudoku	Ultimate Tic-Tac-Toe	Sokoban

Want just one game? Each one also comes as its own file on the downloads page.

NumVisuals, moving backgrounds with a clock, a stopwatch, a timer or a counter on top, comes on its own: download NumVisuals.nwa. Its backgrounds are also in NumPlay: press ⌫ on the home screen.

Big games, installed on their own

These are too big to fit next to NumPlay, so each one is its own app. Install it without NumPlay.

NumPowder _{The Powder Toy: 175 materials to mix, melt, burn and blow up} Download	The Final Earth 2 _{Build a city on floating islands in space} Download	Hollow Knight _{From King's Pass to Hornet in Greenpath} Download
Celeste _{The whole climb, with every B-side and C-side} Download	Champion Island _{The whole island and its seven sports} Download	Undertale _{The whole Underground, from the golden flowers to the barrier and the neutral ending} Download
Doom _{Knee-Deep in the Dead: all nine levels of the shareware episode} Download	The Binding of Isaac _{A whole run: the Basement to Mom, her heart, Sheol and the Cathedral} Download	Plants vs. Zombies _{The whole Adventure, from the front lawn to the roof and Dr. Zomboss} Download
Five Nights at Freddy's _{All five nights, the 6th and the Custom Night} Download	Sonic the Hedgehog _{The whole 1991 game: six zones, the Final Zone, the Special Stages and the ending} Download	Subway Surfers _{The endless run down the tracks, in 3D} Download
Hill Climb Racing _{Thirteen stages, thirteen vehicles and all their upgrades} Download	Cookie Clicker _{The whole game with its own pictures: ascension, the dragon, the Grimoire and the Pantheon} Download	Level Devil _{Unept's troll platformer: the game's 80 rooms, with their own traps} Download
Jetpack Joyride _{Barry's run through the lab, with the vehicles and the Final Spin} Download	Stickman Hook _{Swing from hook to hook: the 39 levels, then no end} Download	Donkey Kong _{The 1981 arcade game: barrels, pies, elevators and rivets} Download
Dune _{Roll down the dunes and fly over the line: 26 balls, 7 landscapes} Download	Monkey Mart _{Run a grocery mart as a monkey: both marts, their crops, animals and workers} Download	Super Mario 64 _{In a repository of its own: NumWorks-Super-Mario-64}
Super Mario Bros. _{All 32 stages, in a repository of its own: NumWorks-Super-Mario-Bros}	More on the way _{Minecraft 1.18.2 and more: see the roadmap}

Your own Game Boy, NES and Sega games

Retro-Go
_{Game Boy, Game Boy Color, NES, Master System and Game Gear games, with Retro-Go's menus and save slots}

Retro-Go plays the Game Boy, Game Boy Color, NES, Master System and Game Gear games you choose: games you own, or free ones like homebrew games. It isn't in NumPlay.nwa. Drop your games on NumPlay Studio and you get a NumPlay with Retro-Go and your games inside.

How to install

You need your calculator, its USB cable, and a computer with Google Chrome or Microsoft Edge. It takes about 2 minutes.

Download NumPlay.nwa, or one of the big games above. Want other games in it? Pick them in NumPlay Studio and it makes a NumPlay.nwa with just those.
Plug your calculator into the computer and turn it on.
Go to my.numworks.com/apps and log in. No account? Sign up there, it's free.
Click Connect, then pick your calculator in the small window that opens.
Add the file you downloaded, then click Install. Keep the calculator plugged in until it's done.
Play! On your calculator, press the Home key (the little house), go to the end of the apps and open NumPlay.

Tip

Updating? Install the new file the same way: your progress comes back by itself. Already have other apps from that website? Add them again in step 5 to keep them.

Which calculators work

Calculator	Software	What runs
N0120	Epsilon 23.2 or newer (the calculator's own software)	Everything
N0110, N0115	Epsilon 23.2 or newer	Everything. These models are about 2.5 times slower, so the big games show fewer frames per second, but they keep their speed.
N0110, N0115	Upsilon	NumPlay-Upsilon.nwa: 24 games (see Other versions)
Any	Custom software built from Epsilon 25.2's source	Everything. These builds can give apps less memory (133 KB): on one that gives even less, a game that needs more says how much on its card.

To see your calculator's model and software, open Settings, then About. To update the software, go to my.numworks.com with the calculator plugged in.

Other versions: hidden, disguised, French, Chinese, Upsilon

File	What it is
NumPlay-Invisible.nwa	The same app, hidden: a blank white icon with no name, so it looks like an empty spot on the home screen.
NumPlay-Matrices.nwa	The same app, in disguise: it looks like a math app called Matrices.
NumPlay-French.nwa	NumPlay en français : tous les jeux, en français.
NumPlay-Chinese.nwa	NumPlay 中文版：所有游戏，简体中文。
NumPlay-Upsilon.nwa	For calculators running Upsilon: the 24 games that fit in the memory it gives apps.

Install any of them instead of NumPlay.nwa: your progress is the same in each. A few things stay in English in French and Chinese: words drawn into pictures, level names, key names, NumBlocks' commands and Portal Returns' stories. The big games come in English only.

On Upsilon, the NumWorks website doesn't install apps (it shows 0 KB free). Install Node.js, plug in the calculator, and run npx nwlink install-nwa NumPlay-Upsilon.nwa in the folder you downloaded it to. This needs an Upsilon that runs .nwa apps: its builds from June 2026 on. On an older one, like Upsilon 1.0.1, nwlink stops with "invalid length for memory": update Upsilon first from its website.

Keeping your saves

Your progress is saved on the calculator as files. Turning it off keeps them.
Installing apps erases these files, all but the Python scripts. So NumPlay keeps a copy of every save in a Python script, numplay_saves.py (the big games have their own), and your progress comes back the first time you open the game. Don't delete these scripts.
A restart erases every file, scripts included: the reset button on the back, or a crash. If your calculator restarts by itself while you play, please email me which game and what you were doing.
The calculator holds 42 KB of files in all. A big NumBlocks world can fill it: delete worlds or scripts you don't need to make room.

The app doesn't show up after installing

The calculator restarts once after installing: it shows the NumWorks logo, then asks for your language. That's normal. Your apps are at the end of the home screen.
Each big game installs alone, without NumPlay and without the other big games: if you pick more than fits, they don't install.
Installing replaces the apps you installed before. To keep one, add it again with the new one.
Nothing happens when you plug it in? Try another cable: some only charge.
Check your calculator's software is Epsilon 23.2 or newer (Settings, then About).

On a real calculator

Crossy Road on a real NumWorks calculator

Filmed on my own calculator, no emulator.

Make your own NumWorks games

NumPlay is also a kit for making games and apps for the NumWorks calculator. Start from its template in one command, then use the same pieces its games are built with: 2D and 3D drawing that fits the calculator's memory, fonts in three languages, saves that survive a reinstall, physics, and an emulator that tests your game without a calculator. It works on macOS, Windows and Linux.

python3 tools/setup.py

python3 tools/new_game.py "My Game"

Read Make your own NumWorks game to go from there, and Contributing if you'd like to help with NumPlay itself.

Roadmap

Credits

NumPlay is a fan project, made out of love for these games and for the NumWorks calculator. If you enjoy a game here, go play the original and support the people who made it. NumWorks also has a great community of people making games by hand: try Numcraft, Celeste Classic, Tatone26's All the Apps, the apps on Nwagyu and yannis300307's list.

Tatone26's All the Apps inspired NumPlay's list of classics. Flappy Bird, Pac-Man, Snake, Connect Four, Solitaire and 2048 are written in C for NumPlay and keep its options, with no code copied from it. Tetris is Tatone26's own, which they released into the public domain, adapted for NumPlay.
Gabriele Cirulli made 2048.
Block Blast! by Hungry Studio inspired NumPlay's Block Blast, written in C for NumPlay with no code or art from it. Its blocks, scoring and colours follow measurements of the app by the players behind blockblast-Self-Improvement-loop.
Flappy Dunk by Voodoo (made with Acid Cousins) inspired NumPlay's Flappy Dunk, written in C for NumPlay with no code or art from it. Its physics and hoops follow the numbers in the game's Android build. Bobydeluxe brought it to NumPlay. Not affiliated with Voodoo.
Tower Blocks by Steve Gardner (MIT License) is ported to C for NumPlay from its source: its sizes, speeds, colours, light and camera are the original's. Bobydeluxe brought it to NumPlay.
Doodle Jump by Lima Sky inspired NumPlay's Doodle Jump, written in C for NumPlay with no code or art from it, drawn in its style on its own page size. Bobydeluxe brought it to NumPlay. Not affiliated with Lima Sky.
Suika Game by Aladdin X inspired NumPlay's Suika Game, written in C for NumPlay with no code or art from it. Its fruit sizes, colours, speeds and timings were measured on the Switch version, with the sizes checked against kairess/suika-game. Bobydeluxe brought it to NumPlay. Not affiliated with Aladdin X.
Core Ball by Random (Yang Hao, MIT License) is ported to C for NumPlay from its own build: its 60 levels, turns, speeds and timing are the original's. Bobydeluxe brought it to NumPlay.
Snake, Solitaire and Block Breaker look and play like Google's games in Search. They are drawn from scratch; nothing is taken from Google.
Chrome's dinosaur game by Google inspired Chrome Dino, which ports its rules, numbers and pictures from Chromium's source (BSD license). LilyTheCatgirl brought it to NumPlay, and also made the live emulator (tools/emulator.py) and the builder (tools/build.py). Not affiliated with Google.
gd3ds by AleFunky and friends, whose research into Geometry Dash made NumDash possible. Clubstep, Deadlocked and Dash also rely on gdsolver's measurements of Geometry Dash 2.2, level data from gmdkit by HDanke and checks against GDRWeb by IliasHDZ.
Balatro by LocalThunk inspired NumPlay's Balatro, which uses art adapted from the game and the m6x11 font by Daniel Linssen.
Minecraft by Mojang inspired NumBlocks, which follows Minecraft 1.8.8 exactly: it makes its worlds the way Minecraft 1.8.8 does and uses its blocks, items, recipes, textures, font and screens.
Celeste inspired NumPlay's Celeste, which uses the game's own pictures, maps, texts and fonts. Not affiliated with Maddy Makes Games.
Hollow Knight inspired NumPlay's Hollow Knight, which uses the game's own pictures, animations, maps, texts and fonts. Not affiliated with Team Cherry.
Undertale by Toby Fox inspired NumPlay's Undertale, which uses the game's maps, pictures and texts from the Undertale Wiki and the game's free demo, and the Pixel Operator fonts by Jayvee Enaguas (public domain). Not affiliated with Toby Fox.
Doom (1993) by id Software, run by its own engine: RP2040 Doom by Graham Sanderson (GNU GPL v2, its own files BSD 3-Clause), made from Chocolate Doom by Simon Howard and its contributors and the Doom source code id Software released under the GNU GPL, with the levels, pictures and texts of the shareware DOOM1.WAD. Not affiliated with id Software, ZeniMax or Bethesda.
The Binding of Isaac by Edmund McMillen and Florian Himsl (Rebirth by Nicalis) inspired NumPlay's The Binding of Isaac, which uses the game's own pictures from Basement Renovator's resources and the Upheaval font by Brian Kent (freeware). Not affiliated with them.
Plants vs. Zombies by PopCap Games inspired NumPlay's Plants vs. Zombies, which uses the game's pictures, animations and numbers as kept by pvz-web, and the Rammetto One and Nunito fonts (SIL Open Font License). Not affiliated with PopCap Games or Electronic Arts.
Five Nights at Freddy's by Scott Cawthon inspired NumPlay's Five Nights at Freddy's, which uses the game's own pictures and words, as the fan ports Five Nights at Freddy's Web (wellsousaaa) and HX-NAF (BaranMuzu) keep them, and the DejaVu fonts (license). How the animatronics move follows RosieSapphire's FNaF64 and LOUDO2's fnaf-1-godot. Not affiliated with Scott Cawthon.
Sonic the Hedgehog by Sonic Team inspired NumPlay's Sonic the Hedgehog, which reads the game's art, levels and demos from the Sonic Retro disassembly and follows the Sonic Physics Guide. Not affiliated with SEGA.
Subway Surfers by SYBO and Kiloo inspired NumPlay's Subway Surfers: its people are fitted to the game's own 3D models and wear their textures, and its logo and item icons are the game's, as the Subway Surfers Wiki shows them; the yard and the trains are drawn after the game. It is lettered in the Lilita One font by Juan Montoreano (SIL Open Font License, license). Not affiliated with them.
Hill Climb Racing by Fingersoft inspired NumPlay's Hill Climb Racing, which uses the game's own pictures from the Hill Climb Racing Wiki, the Teko font (SIL Open Font License, license) and Box2D 2.2.1 by Erin Catto (zlib license, license), the physics engine the game is built on. Not affiliated with Fingersoft.
Jetpack Joyride by Halfbrick inspired NumPlay's Jetpack Joyride, written in C for NumPlay with the game's own pictures (from Halfbrick's Facebook asset archive and the Android game) and its numbers, read from the game's files. Bobydeluxe brought it to NumPlay. Not affiliated with Halfbrick.
Stickman Hook by Madbox inspired NumPlay's Stickman Hook, written in C for NumPlay with the game's own pictures, levels and JUNEGULL font, read from its web version, and its physics checked step by step against the game's code. Bobydeluxe brought it to NumPlay. Not affiliated with Madbox.
Donkey Kong by Nintendo inspired NumPlay's Donkey Kong, which follows the arcade program's rules and numbers, studied in furrykef's dkdasm disassembly and tcdev's annotated listing, with new pictures drawn for it. Bobydeluxe brought it to NumPlay and drew its pictures. Not affiliated with Nintendo.
Dune! by Team Lava inspired NumPlay's Dune, which ports Dune Rider, Inlogic Software's web version: its pictures, Bango Pro lettering and numbers, and its physics, p2.js by Stefan Hedman (MIT License), written again in C. Bobydeluxe brought it to NumPlay. Not affiliated with Team Lava or Inlogic Software.
Monkey Mart by TinyDobbins inspired NumPlay's Monkey Mart, which follows the rules, timings and numbers of the game's web version and uses its pictures, its monkeys and animals and the Riffic font from it. Bobydeluxe brought it to NumPlay. Not affiliated with TinyDobbins.
Level Devil by Unept: NumPlay's Level Devil is written in C with no code from the game, but its 80 rooms (their tiles, traps and timing) are the game's own, taken from its web build by games/leveldevil/tools/fetch.py, and its runner is drawn from the game's sprites.
Pong by Atari (1972) inspired NumPlay's 2 Players, with air hockey, tanks in a maze in the spirit of Tank Trouble and the light cycles of Tron. All four are written in C for NumPlay and drawn from shapes, with no code or art from them.
Cookie Clicker by Orteil and Opti (DashNet) inspired NumPlay's Cookie Clicker, which uses the game's own pictures, texts and numbers (version 2.058, from its public mirror ozh/cookieclicker) and the Merriweather, Kavoon and Noto Sans fonts (SIL Open Font License: Merriweather, Kavoon, Noto Sans). Not affiliated with Orteil or DashNet.
Space Invaders by Tomohiro Nishikado and Taito (1978, Midway in America) inspired NumPlay's Space Invaders, written in C for NumPlay from the arcade's rules with its pictures redrawn from the arcade's, under the Midway cabinet's coloured film.
Sokoban by Hiroyuki Imabayashi (Thinking Rabbit, 1982) inspired NumPlay's Sokoban, written in C for NumPlay with no code or art from any Sokoban. Its levels are Microban by David W. Skinner (2000), used with credit to him.
Sudoku, the number place puzzle (Dell Magazines, 1979; named by Nikoli), is written in C for NumPlay: its puzzles are made on the calculator, and its look and controls follow the phone apps.
Ultimate tic-tac-toe is a folk game, made widely known by Ben Orlin's 2013 article; NumPlay's is written in C for it.
The Powder Toy inspired NumPowder, which ports its materials' behaviour, its font and its icons from its source code (GNU GPL v3.0), by Stanislaw K Skowronek, Simon Robertshaw and its contributors. Not affiliated with them.
The Final Earth 2 by Florian van Strien inspired NumPlay's The Final Earth 2, which uses the game's own pictures, fonts and texts, with additional sprites by LukXD99. Not affiliated with him.
Buckshot Roulette by Mike Klubnika inspired NumPlay's Buckshot Roulette, whose scenes are rendered from the game through the Open Buckshot Roulette project (1503Dev). Fonts: Fake Receipt by Ray Larabie and Dot Matrix by Dionaea.
The Doodle Champion Island Games (2021) inspired Champion Island, which uses the doodle's own pictures, maps and texts from the Google-Doodle-Champion-Island archive by potherca-blog and from the doodle as Google serves it now, and the PixelMplus font by Itou Hiroki (license).
Portal Returns by MateoConLechuga for the TI-84 Plus CE, with sprites by CKH4 and Portal Prelude chambers ported by Unicorn from BuilderBoy's original.
The Nunito and Rammetto One fonts, under the SIL Open Font License (LICENSES).
The Fusion Pixel font by TakWolf (with glyphs from Ark Pixel), under the SIL Open Font License (license), for the Chinese letters.
Upsilon, the custom software NumPlay-Upsilon.nwa runs on.
reversal_lava63, a beta tester who plays NumPlay's apps on a real calculator and reports what's wrong.
Gabriel, who made the home screen's moving backgrounds, translated NumPlay into French first, and tests it on Upsilon and an N0115.
LanoCodes17, whose idea the Konami code is: one of the secret ways into NumPlay from Matrices.
Retro-Go by ducalex inspired NumPlay's Retro-Go, whose launcher, menus and frame skipping are written again for NumPlay with no code copied from it. Its emulators are gnuboy by Laguna and Gilgamesh (GNU GPL v2 or later) for the Game Boy and nofrendo by Matthew Conte (GNU LGPL v2, used under the GPL) for the NES; the Master System and Game Gear are NumPlay's own, around superzazu's z80 by Nicolas Allemand (MIT License). Its tests use Blargg's test ROMs, Matt Currie's dmg-acid2 and cgb-acid2, kevtris's nestest and Frank Cringle's zexdoc and zexall. Not affiliated with them.
NumPlay Studio builds your NumPlay right in the browser with GNU ld and objcopy from binutils (GNU GPL v3), compiled to WebAssembly with emscripten.
Everyone who reported a bug: NEE (reversallava63), Gabriel, briac134, Raphanobie, zbigzo, Yacine, PelicanMan75, Spykube and axio-m. Thank you!

License

NumPlay is licensed under the GNU General Public License v3.0. Copyright (c) 2026 Mason Chen. Code and fonts from others keep their own licenses: the UNLICENSE files in the games' folders and the LICENSES folder. The names, artwork and music of the games NumPlay is inspired by belong to their makers and are not covered by it.

_{Unofficial fan games, not affiliated with NumWorks, RobTop Games (Geometry Dash), Hipster Whale (Crossy Road), the makers of Drive Mad, LocalThunk or Playstack (Balatro), Mike Klubnika or Critical Reflex (Buckshot Roulette), Hungry Studio (Block Blast!), Aladdin X (Suika Game), Voodoo (Flappy Dunk), Lima Sky (Doodle Jump), Mojang or Microsoft (Minecraft), Maddy Makes Games (Celeste), Team Cherry (Hollow Knight), Toby Fox (Undertale), id Software (Doom), Edmund McMillen, Florian Himsl or Nicalis (The Binding of Isaac), PopCap Games or Electronic Arts (Plants vs. Zombies), Scott Cawthon (Five Nights at Freddy's), SEGA (Sonic the Hedgehog, Master System, Game Gear), SYBO or Kiloo (Subway Surfers), Fingersoft (Hill Climb Racing), Unept (Level Devil), Halfbrick (Jetpack Joyride), Madbox (Stickman Hook), Nintendo (Donkey Kong, Game Boy, NES), Team Lava (Dune!), Inlogic Software (Dune Rider), TinyDobbins (Monkey Mart), Atari (Pong), Disney (Tron), Orteil or DashNet (Cookie Clicker), Taito or Midway (Space Invaders), Thinking Rabbit or Falcon (Sokoban), Florian van Strien (The Final Earth 2), The Powder Toy's developers (The Powder Toy), MateoConLechuga (Portal Returns), Valve (Portal), .GEARS (Flappy Bird), Bandai Namco (Pac-Man), Hasbro (Connect Four), Google (Snake, Solitaire, Block Breaker, Chrome Dino, Doodle Champion Island Games), STUDIO4°C or Microsoft (Minesweeper), ducalex (Retro-Go). Tetris is a trademark of The Tetris Company, Chrome of Google LLC, Minecraft of Mojang Synergies AB, Pac-Man of Bandai Namco, Connect Four of Hasbro, DOOM of ZeniMax Media, Sonic the Hedgehog, Master System and Game Gear of SEGA, Space Invaders of Taito, and Donkey Kong, Game Boy, Game Boy Color and NES of Nintendo.}

Gallery

NumBlocks	NumDrive	Balatro
Buckshot Roulette	Block Blast	Suika Game
Portal Returns	Tetris	Chrome Dino
Chess	Flappy Bird	Pac-Man
Snake	Connect Four	Solitaire
2048	Minesweeper	Block Breaker
NumVisuals	NumPowder	The Final Earth 2
Hollow Knight	Celeste	Champion Island
Undertale	Doom	The Binding of Isaac
Plants vs. Zombies	Five Nights at Freddy's	Sonic the Hedgehog
Subway Surfers	Hill Climb Racing	Level Devil
2 Players	Cookie Clicker	Space Invaders
Sudoku	Ultimate Tic-Tac-Toe	Sokoban
Retro-Go	Flappy Dunk	Tower Blocks
Core Ball	Doodle Jump	Jetpack Joyride
Stickman Hook	Donkey Kong	Dune
Monkey Mart

Name		Name	Last commit message	Last commit date
.github		.github
LICENSES		LICENSES
assets		assets
customize		customize
docs		docs
games		games
launcher		launcher
sdk		sdk
tests		tests
tools		tools
.gitignore		.gitignore
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
VERSION		VERSION
_config.yml		_config.yml

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NumPlay

Games in NumPlay

Big games, installed on their own

Your own Game Boy, NES and Sega games

How to install

On a real calculator

Make your own NumWorks games

Roadmap

Credits

License

Gallery

About

Releases

Packages

Contributors

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NumPlay

Games in NumPlay

Big games, installed on their own

Your own Game Boy, NES and Sega games

How to install

On a real calculator

Make your own NumWorks games

Roadmap

Credits

License

Gallery

About

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