Nightmare Fuel / Subnautica: Return of the Ancients

• The Gargantuan Leviathan itself is a sight of terror to behold, as it is now awakened because of the Aurora's Drive Core Detonation from the crash, and now dwells at The Craters' Edge. A completely terrifying, utterly massive eel-like creature that has all black skin and very little luminescence. Beware traveling near the Crater's Edge at nighttime...
  • More to point, The Gargantuan Leviathan is so unbelievably large that any passive scans done of the beast from orbit registers as negative.
    PDA: Estimated Leviathan Size is approximately: ERROR! Sensors unable to scan more than one mile of organic matter at a time.
  • Creepier still in the teaser trailer for the Mod, your PDA seems to take on a level of sapience when it picks up signs of the Gargantuan Leviathan.
    PDA: Outer orbit scan of the Dead Zone has r-r-reported somethi-i-ing unusual and aggressive. Please leave this planet now.
  • The information from the mod developers puts the Gargantuan Leviathan at over 5km (3 miles) in length from nose to tail, which means either the one in the Lost River is smaller than it or the PDA vastly underestimated the creature's immense size. Its roar can disorient and damage the player if it is too near, and it can actually eat and destroy the Cyclops along with you if you don't immediately evacuate the vehicle.