As if the Reaper invasion wasn’t scary enough, exploring the depths of an ocean covered world with skeletal remains of fisherman and deep sea divers aboard shipwrecks coupled with a form of indoctrination by a big bug-squid hybrid just about tops my biggest fears list. Leviathan generally covers the Reapers’ origin. The term “Leviathan” is just a name given to the species in which the current Reapers were modeled after (note, in ME2, construction of a Human Reaper was underway).
The creature that arises out of the dark, watery abyss looks exactly like the metal beings that attack worlds like Earth, Thessia, and Rannoch. However, the “Leviathans” appear to be sentient, aquatic, big beetle-like squid creature with a telepathic influence over the lesser organics. In this DLC, it is revealed that the Leviathans went into hiding in the deep sea of this random world so that they could hide from their ultimate extermination.
The story for this DLC is absolutely amazing and gives incredible insight into history or possible origin behind the cycles, reaping of organics, Harbinger, and general annihilation of all sentient life in the galaxy. At the beginning of the DLC, you assume that it is the Reapers themselves indoctrinating people. Once indoctrinated, always indoctrinated, it appears. However, with the Leviathans, you can be under the influence of their telepathy, but be released and you’re fine. This issue must be related to how the quantum tunneling works for the Reapers versus the Leviathans. In addition, you get to encounter yet another ancient race, like with Javik. It just sparks an interest in what life could be waiting out there for us to discover.
The combat is generally boring, however. When you’re aboard the wreckage, the Reapers send their forces since they’re interested in the Leviathans as well. Let’s just say they send lots of Brutes when you’re in your deep-sea diving mech (given, though, they don’t send a Banshee).