The Ancient Abyss biome appears as one of the fourth biomes in the current game. It's a beautiful biome rich with flora and fauna alike, where the walls are covered in lush vines and plant life, and the spore ridden water features a characteristic green color. Perhaps most fascinating, however, is that many creatures that were once believed to be extinct have managed to survive and prosper in this environment, together with incredible animals never before seen. The boss of the Ancient Abyss is The Sleepy Giant.
The water in this biome is loaded with spores, too much causes acid spitting plants to grow in your sub, and much like the Frozen Waters, the doors will get locked, covered in vines. The players can unlock these doors again by damaging the vines and freeing the door. Ingesting the green water has a chance to infect the player with the Ancient Flu, a deadly illness that makes the character develop nasty green protusions on their face and periodically release bursts of contagious, toxic phlegm.
A list of enemies that can be found in the Ancient Abyss biome:
|Enemy Picture||Enemy Name||Biome||Exterior/Interior/Cave|
|Purple Flower||Ancient Abyss||Exterior|
|Yellow Flower||Ancient Abyss||Exterior|
|Mega Piranha||Ancient Abyss||Exterior|
|Spine Worm||Ancient Abyss (Only in Awakened Mode.)||Exterior|
|Seed Fly||Ancient Abyss||Interior|
|Plant Invader||Ancient Abyss||Interior/Cave|
|Glisten Fish||Ancient Abyss||Exterior|
|Plant Hive||Ancient Abyss||Cave|
|Gas Fish||Ancient Abyss||Exterior|
|Flesh Sac||Ancient Abyss||Belly of the Giant|
|Nematode||Ancient Abyss||Belly of the Giant|
At the bottom of the Ancient Abyss lies The Sleepy Giant.
|Enemies||Roaming Enemies||Dunkleosteus • Eurypterid • Gas Fish • Glisten Fish • Megalodon • Mega Piranha • Purussaurus • Spine Worm (Awakened Mode only)|
|Cave Enemies||Clam • Plant Hive (Seed Fly) • Plant Invader • Trilobite|
|Submarine Interior Enemies||Plant Invader • Purussaurus • Seed Fly|
|Boss||The Sleepy Giant • (Flesh Sac) • (Nematode)|
|Obstacles||Giant Flowers • Seaweeds • Spiky Flesh|
|Dwellers||Egyptians • Egyptian Priestess|
|Related Affliction(s)||Drowning||Ancient Flu|