In '9 - Hours, 9 - Persons, 9 - Doors', the time travel is related to the doors within the game's setting. Each door seems to lead to a different time or space, and the characters must figure out how to use these doors to their advantage in order to progress and potentially change the past or future. It's a more abstract form of time travel compared to some others, but it still creates an interesting dynamic within the game.
In many 'time travel visual novels', the time travel mechanism often involves a specific device or event. For example, in 'Steins; Gate', it's the Phone Microwave (name subject to change based on the translation). By sending messages through this device, the characters can change the past and thus influence the future. The way it works is that the device alters the past in a way that creates a new timeline, which the characters then have to navigate.
In some time travel novels, it's through a machine. For example, in 'The Time Machine', the protagonist builds a device that can take him to different points in time. It's a very mechanical and scientific way of time travel.
In many 'time travel visual novel', it often involves a device or a special ability. For example, in 'Steins; Gate', the Phone Microwave is the key time - travel device. It can send messages to the past, which then alters the present.
Time travel in these graphic novels can be really complex. Take 'A Wrinkle in Time' graphic novel as an example. Here, the concept of 'tesseracts' is used for time travel. It's a sort of folding of space - time that allows characters to move across different times and spaces. In some noir - style time travel graphic novels, time travel might be a result of a mysterious experiment gone wrong. And in some post - apocalyptic time travel graphic novels, time travel is often a desperate attempt to change the past to prevent the apocalypse. There are also those where time travel is more of a mental journey, where the character's consciousness travels through time rather than their physical body.
In many time travel light novels, it often involves magic or some kind of supernatural power. For example, in 'Re:Zero', Subaru's 'Return by Death' is a mysterious ability given to him, which is like a form of time travel. In other novels, it could be a portal or a spell that transports the character to a different time or place. Sometimes it's a result of a scientific experiment gone wrong, like in some science - fiction - inspired light novels.
Another way time travel works in these fanfictions is through dreams or visions that turn out to be more than just that. A character might have a really vivid dream about the past or future in Riverdale, and then suddenly find themselves actually in that time period. This method allows for a more psychological exploration of the character as they deal with the shock of suddenly being in a different time and having to figure out what's real and what's not.
In some RWBY time travel fanfiction, it might work through the use of a special relic. The relic could have powers that are not fully explored in the original series but in fanfiction are used for time - traveling. For example, it could be activated by a specific combination of Dust or a certain type of Grimm blood.
In some Bridgerton time travel fanfictions, it could be a magical object that enables the time travel. For example, a mysterious locket that transports the wearer to different eras within the Bridgerton world.
In many Narnia time travel fanfictions, it often involves magical objects. For example, a enchanted hourglass might be the key to traveling through time. The sand in the hourglass could have the power to send the character to a specific time in Narnia's past or future.
In Homestuck time travel fanfiction, time travel often involves the use of the various time - related mechanics in the Homestuck universe, like the Green Sun or the Scratch. The Green Sun, for example, could be a portal through which characters can travel to different points in time.
In many time travel book fictions, it can work through a device. For example, in 'The Time Machine' by H.G. Wells, the time traveler uses a literal time - traveling machine. Sometimes it's magic, like in some fantasy - based time travel stories where a spell or a magical object enables the journey through time.