Introducing the Lichter der Tiefe (Lights of the Deep) mod!
Lichter der Tiefe is a mod that follows the story of Emily as she explores a strange world underwater and meets a cast of characters and creatures. It features a story-driven plot, multiple endings, and some neat choices and scripting logic. It's not really a new mod; it's a German mod made in 2013 that fgenesis and I found, translated to English, and packaged up into the new mod format with the original creators' blessing.
To install, make sure you have the latest version of Aquaria:
http://www.bit-blot.com/forum/index.php?topic=4313.0 and download it from the ingame mod menu. (Or you can download the mod files individually at
https://github.com/AquariaOSE/Lichter_der_Tiefe/tree/master/Project. No guarantees that it'll work without the latest version of the game anyway, though)
Screenshots:



Enjoy!