One should look for unique concepts. Maybe it's a crossover that no one has thought of before, like 'Mass Effect and Discworld'. How would the magic from Discworld interact with the biotics in Mass Effect? Also, the pacing of the story matters. It should keep you engaged, not be too slow or too rushed, especially when introducing the different elements of the two universes.
Character development is crucial too. Since it's a crossover, seeing how characters from both universes grow and change in response to the new situations created by the crossover. For instance, Shepard from Mass Effect having to deal with the more complex galactic politics of Stellaris. This makes the story more engaging and relatable.
One key element is how the powers and abilities are integrated. For example, how the Warframe's parkour and combat skills mesh with the biotics and tech in Mass Effect. Another is the interaction of the characters. It should feel believable when a Tenno meets a Shepard or other Mass Effect characters.
Character exploration of James is a key element. Writers often dig deep into his personality, his motives, and his relationships with other characters in the Mass Effect universe.
One key element could be the sense of despair. The title itself implies that the war is hopeless, so this feeling would likely pervade the entire story. This could be shown through the characters' actions and dialogue. For example, a character might say something like 'We're fighting a losing battle' to emphasize the situation.
One great 'Mass Effect' crossover fanfiction is 'Mass Effect and Star Wars: The Galactic Alliance'. It combines the rich lore of both universes in an exciting way, with characters from 'Mass Effect' interacting with those from 'Star Wars'. Another is 'Mass Effect meets Warhammer 40K', which creates a really unique and action - packed story as the two very different sci - fi settings collide. There's also 'Mass Effect and Halo: The United Front' that has some really interesting character dynamics between the heroes of the three franchises.
One great 'Fallout Mass Effect Crossover Fanfiction' is 'The Wasteland Beyond the Stars'. It combines the post - apocalyptic feel of Fallout with the space - faring adventure of Mass Effect really well. The main character from Fallout somehow gets transported to the Mass Effect universe and has to adapt to the new technology and politics there.
Well, Master Chief would likely start by assessing the threats in the Mass Effect universe. He'd notice the Reapers right away as a major threat. His military training would kick in, and he'd try to find ways to combat them. In terms of adaptation, he'd probably look for allies. He might be initially skeptical of the alien species but would soon realize that they can be valuable partners. For instance, he could team up with the Turians, who also have a strong military tradition. He'd also have to adapt to the different forms of transportation, like the Mass Effect relays. His first encounter with using one of these relays might be a bit of a shock, but he'd quickly figure out how to use it to his advantage.
One common theme is the clash of different power systems. The spiritual powers in Bleach and the biotic and tech powers in Mass Effect are very different, and seeing how they interact is exciting.
One challenge is getting the lore right. Both Mass Effect and the other franchise (PA, whatever it is) have their own detailed backstories and rules. For example, in Mass Effect, the technology like biotics and mass relays are very specific. If you're crossing it over with another universe, you have to make sure these elements blend well. Another challenge is character consistency. The characters from Mass Effect have distinct personalities, and when you put them in a new situation in a crossover, you need to keep that essence intact.
A good crossover combines the elements of both universes well. For example, it might blend the unique species from Mass Effect like Turians and Asari with the Force - using concepts from Kotor 1. The characters should be in - character. If Shepard from Mass Effect meets Revan from Kotor 1, their personalities and motives should be consistent with their original games.