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Copyfree Works

The license status of some works may be more complex than it at first appears here. In some cases, the license status listed for a given work is the "primary" license under which it is distributed. In several cases, parts of the work may be distributed under other licenses -- potentially even non-copyfree licenses.

Where present, descriptions are typically drawn from the claims of the projects themselves, and represent neither claims nor opinions of the Copyfree Initiative. Inclusion here (with or without description) does not constitute, and should not be inferred as, endorsement of any project.

Listings are presented for informational purposes only, and no representation is made as to the accuracy or utility of any information provided. Use at your own risk.

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bricktickpermalink

License Reference

Bricktick is an curses based Arkanoid/Brickbreaker clone for UNIX.

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clitherpermalink

License Reference

Implemented in C and Vulkan, clither is a Slither.io implementation.

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Craftpermalink

License Reference

Craft is a Minecraft clone for Windows, Mac OS X and Linux. It is written in just a few thousand lines of C and uses modern OpenGL (shaders). Online multiplayer support is included using a Python-based server.

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darkforestGopermalink

License Reference

DarkForest is a Go game engine powered by Deep Learning and developed at Facebook AI Research.

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Drollpermalink

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Droll is a dice rolling simulator designed for use with RPGs. It comes with a Ruby library as well as command line and IRC dicebot interfaces.

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Godotpermalink

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Godot is a fully featured, open source, copyfree licensed game engine. It focuses on having great tools and a visual oriented workflow that can export to PC, Mobile, and Web platforms with no hassle. The editor, language, and APIs are feature rich, yet simple to learn, allowing you to become productive in a matter of hours.

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IrrRPG Builderpermalink

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KGS Lebenpermalink

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KGS Leben is a client for the KGS Go Server, written for modern, standards-compliant web browsers such as Chrome, Firefox and Microsoft Edge. It connects to the server via the JSON API for KGS.

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Nothing To Hidepermalink

License Reference

Nothing To Hide is an "anti-stealth" game where you are forced to help in your own surveillance. The puzzles are challenging but fair, with depth in a deceptively simple mechanic, similar to games such as Braid and Portal. It's a story of a teenage girl riddled with insecurity in a world obsessed with security. She's never had a private thought. If you can't hide who you are . . . you have to hide who you really are.

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Octaforgepermalink

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Octaforge is a 3D game engine.

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oldrunnerpermalink

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OpenClonkpermalink

License Reference

OpenClonk is a free multiplayer action game in which you control clonks, small but witty and nimble humanoid beings. The game is mainly about mining, settling and fast-paced melees. It is not just a game, but also a versatile 2D game engine that allows the creation of mods. It is the successor of the shareware game series Clonk and thus inherits many of its features.

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Patent Blasterpermalink

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Patent Blaster is a sidescrolling explodey kind of game based on awful patent art come to life. Your mission: invalidate those patents using any means necessary.

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RocAlphaGo [1]permalink

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RocAlphaGo is an independent, student-led replication of DeepMind's 2016 Nature publication, "Mastering the game of Go with deep neural networks and tree search".

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Rollempermalink

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Rollem is an IRC dicebot written in Ruby, with some additional IRC functionality.

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Shin KGSpermalink

License Reference

Shin KGS is an unofficial JavaScript client for KGS Go Server.

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SIEGEpermalink

License Reference

The SIEGE 2D game engine is licensed, in its entirety, under the terms of the Simplified BSD License. Artwork, however, is included under a mix of other terms, including (for instance) the Bitstream Vera Fonts Copyright and public domain copyrights.

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Torque3Dpermalink

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Torque3D is a well-tested, constantly evolving, open source, 3D, C++ game engine.

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Uebergamepermalink

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Uebergame is a free, open source, casual, multiplayer first-person shooter based on the Torque3D engine.

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vitetrispermalink

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Vulkpermalink

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Vulk is a 3d engine aimed to provide the best graphical experience with Vulkan API. It is written in Python with C binding and is based on SDL2.

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We Become What We Beholdpermalink

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WBWWB is a game about news cycles, vicious cycles, infinite cycles.

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Xanadupermalink

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Xanadu is a text-based game engine for the browser.

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