Why are so many Amnesia custom stories so similar?

[Adny]

Simply put: you're playing the wrong custom stories.

There are some promising projects that have been made or are on the Horizon that utilize new models and mechanics. There are even a few unique ones that use only assets from the original game (building sets/models/music/etc) but are well put together. But, seeing as how you've played 100 mods, I'm sure you've already picked through the best ones.

The HPL2 is rather simplistic engine to work with (as far as basics go) so there is a lot of lower quality modding.