Who owns copyright of video gameplay captures? There are many videos on Youtube and it doesn't seem they are being removed, so one might conclude that they do not infringe copyright of the game publisher. But it could also be that for copyright purposes these constitute derivative works, but game publishers are happy to have the publicity and so they don't request Youtube remove the videos. I have noticed that gameplay videos sometimes miss the game's original sound. One video's description explained that the sound had to be removed since it (naturally) contained music from the game. Is it possible that video of gameplay constitutes fair-use but audio, at least in some situations, does not? Are these questions subject to license terms of the video game software?
In general, a gameplay video would be either a partial copy or a derivative work, and in either case an infringement if created without permission. Such a video might be covered under fair use in US copyright law, particularly if made for the purpose of commentary on a game or instruction in how to play or design a game. In general, a fair use defense is more likely to succeed if only the minimum amount of the work required for the purpose is used, and sound tracks might not be required for such a purpose. Thus a maker of such a video might choose to omit the sound to improve the fair-use case. Moreover, when the sound track contains licensed popular music it would be subject to a separate copyright, and many music publishers are notoriously litigious, so prudence would advise omitting the sound. All that said, fair-use is a case-by-case determination, and if the makers of such videos have not been sued, they (and we) can only guess how a case would turn out. As to why game makers refrain from having such videos taken down (if they in fact do refrain) one can only speculate. Game publishers may consider the videos good advertising. Questions based on the absence of legal proceedings are inherently speculative, unless a copyright holder has announced a policy of not taking action and the reasons for it.
Cheating in video games is not against the law. (If it's not for profit) IANAL The legality of cheating in video games has already been challenged in a court of law. You see, Nintendo didn't want people to cheat. Fearing it would lower the financial value of their games if you can beat them in just a few minutes. It was argued in court that a video game is no different than a book. If you want to read the end of the book, skip to your favorite chapter or skim quickly through a boring part you can. The conclusion is the game is yours to enjoy in anyway you want. Nobody can tell you how to play your game. There's an interesting and short documentary about the legal history of cheating in video games by the gaming historian. Also it doesn't matter what the TOS says. TOS is not legally binding Good news: another federal judge has ruled that violating a website terms of service is not a crime. But there's bad news, too — the court also found that bypassing technical or code-based barriers intended to limit access to or uses of a website may violate California's computer crime law. However, I've read you can be sued for breach of contract, if the site can prove any damages based on your cheating. I found that answer here on Law.SE and they didn't provide a source so I can't verify if it's true.
If any elements of the game are protected by copyright, then you cannot reproduce those elements (17 U.S.C. §106) unless your reproduction falls under a fair use exception (17 U.S.C. §107). Elements that may be protected by copyright include: artwork specific language on each card the aggregate effects of the cards (i.e. copying a single card's effects might not infringe copyright, but if you copy the effect of a bunch of the cards, such that you are taking expression of the original author's creativity, that might infringe, even if you change the words used) Whether an element of the game is protected by copyright is a fact-intensive question that would depend on the specifics of the game. Whether your copy infringes is likewise a fact-intensive question that would depend on what you copy. Fair use is also a fact-intensive, case-by-case analysis, but in my opinion, it is likely that creating a computer program derivative work (17 U.S.C. §101) of the game for your own personal education would be considered fair use. From a practical standpoint, even if it were not fair use, it would be near impossible for the copyright owner to discover. Posting the code on GitHub tips the scales away from fair use because of (17 U.S.C. §107(4)): "the effect of the use upon the potential market for or value of the copyrighted work." But, none of the factors are determinative on their own. You ask: I likely cannot simply change all the names of the various cards to something else, right? I agree. In my opinion, the selection and arrangement of the effects attributed to each card is an expression of the author's creativity, and no matter what you call the cards, copyright in the game would be implicated if you retained the effects associated with each card. If I start changing the rules of the game, does that make it legal for me to share my source code, for instance? At some point, it will be an entirely different game, so certainly, in the limit, your work would not be infringing. We can't answer where that line is, but in general, the less of the original author's creativity that you re-use, the less likely a ruling of infringement. Also, in general, the more transformative your work is, the more likely a fair use exception would apply.
The images as displayed are quite similar, similar enough that one could violate the copyright of the other. But that is not enough to know if there was in fact a copyright infringement. There are several possibilities: Although using different names, the developers could in fact be the same company. One developer might have obtained permission to use the image from the other. Both images might be based on the same 3rd-party image which both are using with permission. Both images might be based on a public domain image. Copyright is only infringed if a protected work, or a derivative version of the work, is used without permission from the copyright holder. Without knowing who the rights-holder is, and if permission has been obtained, one cannot know if an infringement has occurred. There is no independent or 3rd-party entity that checks for copyright infringements. By the way, the similarity here is close enough that there might also be an issue of trademark infringement. But again, infringement requires use of a protected mark without permission, and so some of the same possibilities arise. (The source of a trademarked logo doe not matter. On the other hand there cannot be trademark infringement unless the mark has been registered, or actually used in commerce. If the same image is used on products in very different industries, say games and hammers, there may or may not be infringement.)
It is a fact that a particulate chess game was played on a particular date by certain specific players, who made specific moves. Facts are not protected by copyright. Anyone is free to report such a game, including the exact moves, and the names of the players. Such games are often used in books about chess, and the same thing is done in books about other games, such as bridge and go, where a record of the play is often kept. If someone else has described or analyzed such a game, you may not copy that person's wording without permission (except to the limited extent permitted by fair use or fair dealing). A chess diagram simply represents the position of the pieces in a standard way, and has no original content beyond those facts, and so is not protected by copyright either. If a person has invented a chess game or a series of chess moves that never took place to illustrate a point in analyzing chess, re-using that sequence of moves might make the new analysis a derivative work of the previous one, if the coverage of the invented sequence of moves is extensive. But that would not apply to the moves of an actual game that was actually played. There have even been cases of fictional stories based upon real historical chess games. For example &quot;Unicorn Variation&quot; by Roger Zelezney. 17 USC 102 says: In no case does copyright protection for an original work of authorship extend to any idea, procedure, process, system, method of operation, concept, principle, or discovery, regardless of the form in which it is described, explained, illustrated, or embodied in such work. This is the &quot;fact/expression distinction&quot; by which it is said that facts are not protected by copyright, although the form of expressing those facts often is. The same section has the list of kinds of protected works. This includes literary, dramatic, musical, and pictorial works, dance, audiovisual, sound and architectural works. A chess game does not fall into any of those categories. Thus it is ineligible form protection on two separate but related grounds. Beyond that, under the Feist vs Rural decision, a work must have an element of originality to be protected by copyright, and a list of the moves made by chess players has no original content, although an analysis of a game would. The copyright laws of many other countries have been interpreted similarly. As to the question of offense, in the US at least, and in most other countries, a true statement is never legally defamatory, even if the subject dislikes it. If it is true that Player X lost to Player Y on such and such a date, reporting that fact cannot be libel or any form of defamation. Otherwise the loser could never be named in any sports reporting.
You don't just want to ask, you are required to obtain a license (or in other terms: the OK of the author*). Your game is based on a book. That makes your game a derivate work. Under berne convention, any signer state has to make sure that the author* has the right to authorize any derivate. That includes translations, films, or games. Without a license, you violate copyright law. It doesn't matter if your game is free. To stay safe, you need to obtain a license. Quite some authors would be happy to cut a deal, license or guidelines for fan-projects. As an example, the late Sir Terry Pratchett OBE has specific guidelines on what is ok and what not. Ask your author* about these questions and consult a Lawyer! Only then make your fan project! * This means the author, their estate or whoever they assigned their rights in the work to. Some examples: For that teenage wizard in a private castle charter school that'd be a certain J.K. Rowling. For those hairy-halflings running all over the continent hunted by orcs that'd be the J.R.R. Tolkien-Estate. And for those space wizards using blades from solid light that'd be The Walt Disney Company or one of their subsidiaries.
No If YT#1 gets a license from artist A, that permits YT#1 to do whatever copying and reuse is stated in the license. It might be narrow or very broad. Usually such a license will only grant permission to the person who asked. Unless the license also grants permission to YT#2, or to some broader group which includes YT#2, YT#2 cannot claim any rights under such a license. Assuming that the license does not include him or her, YT#2 has the same rights as any member of the public would, but no more. In general, pitch raising a piece of music is a way of creating a derivative work. In the US, under 17 USC 106 one needs permission from the copyright owner to create a derivative work. Otherwise doing so is copyright infringement. The laws of other countries, and the Berne Copyright Convention have similar provisions on this point. Creating a derivative work requires permission in all countries that I know about. &quot;Piggybacking&quot; is not a thing in copyright law. A copyright owner can give permission (usually called a license) to any person or group of persons that the owner pleases. The permission does not extend to anyone else. This is true in all countries. I should be clear that YT#2 needs permission from both YT#1, and from A. The way the question is worded I have been assuming that YT#2 had permission from YT#1, but a comment from grovkin made it clear that I needed to be more explicit about this. It is possible for a license to permit a person to pass on the license to others. For example, all CC licenses and all copyleft and most open source licenses do this, and others could. But the license must explicitly grant such permission. The one way in which a person might create a derivative work without permission and without it being infringement is if an exception to copyright applies. In the US the main exception to copyright is fair use. See Is this copyright infringement? Is it fair use? What if I don&#39;t make any money off it? for more detail on fair use. Fair use decisions are made on a case by case basis, and generally depend on the detailed facts of the ase. But based on the limited info in the question, this would not qualify. It seems to use the whole piece of music, which tends to weigh against fair use. The new work does not seem to be transformative, that is, it seems to serve the same general purpose as the original. The new work might harm the economic value of the original, or might if many people did this. The original is creative, not factual. All of those weigh against fair use. Different countries have very different exceptions to copyright, and I do not know all of them. But the use described in the question does not seem to fit any that I know of. In any case, an exception to copyright applies to anyone, and does not depend on another person's license. It is thus never a form of &quot;piggybacking&quot;. By the way, the question describes pitch raising ads &quot;illegal&quot;. Making an unauthorized derivative work gives the copyright owner grounds to sue. If the owner does sue, and wins, s/he might be awarded money damages, and the court might issue an injunction ordering the infringer not to infringe again. But it would not normally be treated as a crime, and law enforcement would not be involved. In the US, only bulk copyright infringement, carried out as a business, is usually prosecuted (for example a factory churning out unauthorized music CDs).
Monopoly is a trademark of Parker Brothers. You would need to get permission to use that trademark. The artwork of the game is copyrighted and cannot be duplicated without violating that copyright. In general, the labels meaning phrases like "Go to Jail" and "New York Avenue" are probably copyrighted and some court decisions have decided that labels are a copyrightable element. However, there is some gray area. The game mechanics are not copyrightable and can be duplicated. What this means is that if you clone the game and use new labels (like new property names and card titles) then you are probably fine. You would have to make a novel board design. If you clone the game, but use the game's labels, then you could potentially lose in court. Of course, remember that corporations will sometimes sue just to intimidate people, even if they have a losing case. Just because your clone is non-infringing doesn't mean they won't sue you. It costs them money to sue people, so if your clone is obscure or not used by many people it could fly under the radar and be ignored by the company. If your clone was a success and became widely used, that would significantly increase the chance you could get sued. In most cases a company will threaten infringers before they sue them, because it is a lot cheaper to threaten somebody than sue them. Therefore, you could make your clone and just plan on discontinuing it if they threaten you. Of course, there is a small risk they would sue you anyway. If you made no money then you are probably safe because it would be a lot harder for them to argue that you commercially damaged them if you made no money.