This is map 5 out of 7 of my current personal project, Tomb of Thunder. Named His Still-Breathing Corpse, it takes place at the digging site after the Damocles Facility, which is said to be the epicenter of the reported anomaly. The level is built around a parallel world gimmick, similar to Metroid Prime 2: Echoes, which was the main inspiration for this map.
This took 2 months to make.
Tomb Of Thunder is currently a work in progress.