There are Portal 2 fanfictions that center around the idea of a rebellion within Aperture Science. The test subjects band together and try to take on GLaDOS in a different way than what we see in the game. There are also fanfictions that introduce new characters, like a rogue AI that was created by accident and now causes chaos in the facility. Fanfictions can also explore the emotional states of the characters more deeply, such as GLaDOS' possible feelings of loneliness despite being a powerful AI.
There might be a fanfiction where the technology from the Portal universe is introduced into the 'Man in the High Castle' world in a more extreme way. Maybe the characters start using Portal - like devices to travel not just between different areas in their own world, but also to access hidden dimensions within their alternate history. This could lead to all kinds of chaos and new alliances.
There are many other great topics like adventure stories, historical events that are much more worthy of our attention.
Perhaps an 'old reliable portal story' involves a portal that exists between two different worlds. In this story, a group of adventurers discovers the portal. They are from a world full of technology and find themselves in a world of magic. The portal is old and reliable, always there to take them back and forth as they learn about the magic world and try to bring some of its magic back to their own world.
One interesting MLP Portal fanfic could be 'The Adventures in Equestria and Aperture'. It combines the magical world of My Little Pony with the mind - bending puzzles of Portal. Another great one is 'Twilight's Portal Experiments' which explores how Twilight Sparkle might interact with Portal technology if it existed in the MLP universe.
Well, in some portal Naruto fanfic, the portals could lead to alternate universes where Naruto's parents are alive. This would change his entire journey as he now has the support and guidance of his family. Also, there could be a fanfic where a portal is opened to a realm full of powerful and ancient ninja techniques that Naruto has to master to save the world from a new threat.
One interesting RWBY - Portal fanfiction could be about the characters from RWBY finding themselves in the Aperture Science facilities. They might have to solve the Portal - like puzzles while also using their own unique abilities. For example, Ruby could use her speed to quickly move between portals.
One interesting portal fiction short story is 'The Door to Another World'. In this story, a young girl discovers a mysterious door in her attic that leads to a magical realm filled with strange creatures and beautiful landscapes. Another is 'The Portal in the Forest', where a hiker stumbles upon a portal hidden among the trees and is transported to a prehistoric era. And 'The City Beyond the Portal' tells of a man who finds a portal in an old abandoned building and enters a futuristic city.
There are also modern - day urban fantasy stories. A story might have a magical portal in an old, abandoned building. A character might enter this portal and find themselves in a world where animals can transform into other forms, like a cat turning into a human - like figure with cat - like features. This transformation often serves to explore themes of identity, the relationship between humans and animals, and the mystery of different realms.
One interesting story could be about a character who travels back in time to meet their ancestors. They learn about their family's history in a very personal way, facing challenges like adapting to the old ways of life and language barriers.
Another interesting idea is a story where Mel teams up with some of the other test subjects she's only heard rumors about. They could work together to try and escape the facility in a more coordinated way than in the original game. In this fanfiction, there could be a lot of character development as they learn about each other's strengths and weaknesses.