No, it's not appropriate. Since it involves adult content, it goes against the general standards of public decency and is not suitable for a wide audience, especially minors.
DOA (Dead or Alive) adult fanfiction refers to fictional stories written by fans that are related to the DOA franchise and may contain adult - themed content such as mature relationships, sexual situations, etc. However, such content is often not in line with the original intention of the game series which focuses more on action, fighting and character development in a more general sense.
I'm not entirely sure specifically what 'doa adult fan fiction' is about as the 'doa' could refer to different things like 'Dead or Alive' (a game series). Fan fiction in general is fictional writing by fans based on existing works. But without more context, it's hard to say precisely what this particular 'doa adult fan fiction' involves.
For an OC in DOA fanfiction to be great, they should have well-defined powers or skills that are balanced and don't overshadow the existing characters. Their interactions with the canon characters should be believable and add depth to the story. Also, a distinct visual design helps them stand out.
Hardcore fanfic is a type of fan - created fiction that often delves deeply into extreme or intense interpretations of the source material. It might explore darker themes, complex character relationships, or unique plot twists that are more on the edgy side compared to regular fanfic.
Hardcore fiction typically refers to a genre of fictional works that are intense, often dealing with extreme or gritty themes, complex characters, and may have a darker or more uncompromising tone. It can cover a wide range of topics such as survival in harsh conditions, moral dilemmas in extreme situations, or in - depth exploration of human nature's less - pleasant aspects.
First, check for updates. The game developers may have released patches to fix bugs, including those that might prevent the story mode from working. If there are updates available, install them. Second, make sure your network connection is stable if the game has any online components related to the story mode. A poor connection could cause issues.
One interesting doa fan fiction could be about the characters' backstories before the main events of the game. For example, a story exploring Kasumi's training days in her village.