This level was created for Back to Basics 2018: Space. The premise was that Lara would travel down a gravity elevator (like a space elevator, but going down) into the Mariana Trench. Alien ruins and wildlife had been found there, and Lara’s suit would allow her to safely explore and unravel the mystery.
I did port the level to Tomb Engine at one point, and while the concept does intrigue me, the level is far from finished and lower on the totem pole of priorities at the moment. So most likely this level will never be finished.