There are original characters, but they can only be considered one of the protagonists at most.
From the beginning of writing Alien, some characters were eliminated and almost all horror films were replaced.
The setting has been significantly changed. For the needs of the plot, some principles have been slightly deleted from the original work, so that even those who have not read the original work can generally understand it.
The main plot is basically based on revenge, and the plot and content, including character stories, will be replaced.
Finally, I respect the original work and support "Infinite Horror". Although Z will no longer write "Infinite Future", I can wait for 2017... (Would I say this is the product of my resentment)