Oh yeah, I remember now. There was that different dimensions storyline.
I played Bioshock 1. In terms of gameplay I thought it was too twitchy for my taste but the game is quite old. They could actually remake it.
In terms of story and lore, however, it's in my top 5 games. The lore is extremely detailed and good, at the level of Witcher but short in comparison. It is quite scary and philosophical/psychological and the game itself has an aesthetic that reminds me of the Tim Burton Batman movies, except underwater.
I also like the story, characters and lore of Bioshock 2 a lot. I can't really choose between the two. I like both games a lot but for me the lore and world of Bioshock 1 left a bigger impact.
Bioshock 2's world is very disney-fied but also awesome and horrifying at the same time.
The voice actress for Elizabeth is beautiful by the way and can sing.