To successfully tackle video game localization, you need to be aware of the challenges this unique field presents:
As one of the richest and most complex genres, video games nowadays are highly sophisticated, not only in terms of language and setting but also concerning the many different elements they combine: gameplay, story, and other localization-dependent aspects.
These can include narrative elements (such as dialogs or narration in cutscenes), names of characters or game world elements, in-game instructions, and of course, user interface strings, messages, buttons, menus, etc.
Moreover, the actual game content can be extremely rich and diverse: Vocabulary, jargon, and terminology from vastly different topics, and eras, even: from the fantasy genre to medieval times to modern suburbia to sports and science fiction, the list is virtually endless, similar to what you would encounter in literature or the film industry.
This is also reflected in the many different genres of games in the market: from sandbox games to platformers to simulation and sports, there are many different kinds of games, with still more combining elements from two or more genres.
Repeatability of the content further compounds things, as most games are not designed for a single play-through but are meant to be played multiple times so that the players can take advantage of the full experience and their money's worth (opposite to what is happening with films, for example). This means that a mistake, if present, will get huge visibility and end up irritating and alienating the audience — more than if it was present in some other form of short-lived content.
