« on: 16 Feb 2017, 18:11 »
Not a lawyer or expert, but my layman's understanding:
Trademarks are "marks" that identify a product for sale. They can be pretty much anything: a name, a logo, a character, a jingle. They need to be registered, and they are only protected within the scope of a certain business. So for example "Apple" is a trademark name in the computer market, but you would still be able to use it for something completely different, e.g. as a clothing brand, since there's no risk of confusion. Trademarks do not expire as long as they are used. Companies MUST defend their trademarks, or risk losing them, so you cannot rely on them turning a blind eye even to non-commercial fan creations.
Some fictional characters are trademarked because they serve as mascots for products (e.g. Tony the Tiger, Mickey Mouse), or just because they are important to the company and it offers additional legal protection, but most are not. Indiana Jones may very well be trademarked, but I wouldn't expect a side-character from the series to be. You might want to check that.
What's probably much more relevant is copyright, which is an entirely different thing. Every creative expression these days is automatically copyrighted, without any need for registration. Copyright is not limited to a particular context, medium or business: if you take a character from a book under copyright and use it without permission in a game, or to sell cookies, that is still copyright infringement. However, copyright is subject to fair use limitations, which means that others are allowed to use it in certain ways (most notably parody, but other things as well) without that infringing on the copyright. Copyright eventually expires (at least in theory), but companies do not risk losing copyright if they don't aggressively protect it, so they can choose to look the other way (and often do so for non-commercial fan-created work).
Basically, your use of a copyrighted character (any character from Indiana Jones who is not an historical character, like Hitler, or from some earlier piece of fiction that is out of copyright) is most likely a copyright infringement, unless what you create falls under fair use – and I wouldn't think what you describe does. However, LucasFilm has mostly been fairly tolerant of fan works of this kind as long as it is non-commercial and doesn't compete with official products. A resumé piece would probably be fine. If you acknowledge LucasFilm's ownership of the character in the game, use a title that is clearly separate from any official LucasFilm product (film, game or other), and make it clear that this is a fan-created, non-official work, you should probably be fine.
As a practical point, the legal situation doesn't really matter: if Disney don't like what you're doing, they'll send you a Cease and Desist notice, and since they have unlimited lawyers it will be impossibly expensive for you to fight them, even if what you're doing is legal. Vice versa, it doesn't matter if you're infringing on the copyright if they don't care about it. So the question is really, is this the kind of thing Disney/LucasFilm try to stop?