Timeline

This is the timeline of the known events of the SS undefined.

The End of the Human Era

 * Around 12,000 years ago - Humans lived on Earth, in a series of constant wars as technology developed.
 * Around 12,000 years ago - Humans did not pay attention to Earth's problems which got worse with a series of supermassive volcano eruptions around the globe.
 * 12,000 years ago - A professor created a cryogenic capsule that could freeze someone for thousands of years. At this time, this professor created a telephone, Tartar, that stored humanity's knowledge, and watched from afar. Judd is preserved by his human owner in the cryogenic capsule (Sunken Scroll 27).
 * 12,000 years ago - At the same time, flooding sea levels drown out much of Earth's land, flora and fauna, wiping out all mammals, humans at the surface included (Sunken Scroll 25).
 * 12,000 years ago - Some humans survived the flooding and resided in Alterna, while others who tried to escape to other underground domes perished.
 * 12,000 years ago - Another group of survivors went in search of a new planet. They created the space shuttle Ark Polaris, and brought numerous Earth's species alongside them.
 * 12,000 years ago - When trying to reach the edge of the Solar System, the Ark Polaris was damaged by debris, damaging its navigational system and forcing the crew to go back Earth, but with not enough fuel to land, the Ark Polaris drifted, the next 10,000 years, with their animals hibernating during that time.
 * Around 12,000 years ago (25 years after Earth's flooding) - Alterna's scientists, who ruled in the settlement, made great innovations, including liquid crystals from the bodily fluids of squids. This invention was able to read human minds which, after mass-producing them and lined the cavern's walls and roof, they were able to see the surface sky the crystals projected due to the collective desire.
 * Around 12,000 years ago - Alterna's leaders were replaced by the next generation, which having desire of seeing Earth's surface again, created the Spirit Lifter, but during an engine test it overloaded the cavern's liquid crystals, provoking a violent reaction which made the stone walls fall down upon the last surviving human settlement, ending any human hope of recovery.

Before the Mollusk Era

 * 12,000-2,000 years ago - For 10,000 years, there was no known activity of sentient life.
 * 12,000-7,000 years ago - After Alterna's collapse, great amounts of the liquid crystals that once covered the cavern's walls fell into the waters below and broke into microscopic fragments. These were absorbed by generation after generation of the sea creatures living in Alterna's waters. This process, together with the absorption of whatever else may have been floating in those polluted waters, passed down to the marine organisms "fresh impulses", accelerating their evolution, until one day they set foot on dry land, and they eventually left Alterna and reached Earth's surface.
 * 12,000-7,000 years ago - At some point global water levels receded.
 * Around 7,000 years ago - An Inkling individual was born. He had unique characteristics coming to be considered a prophet for all his knowledge, stablishing the foundations of the cephalopod civilization.

Start of the Mollusk Era

 * 2,000 years ago - The Mollusk Era is considered to begin, although sea creatures reached the surface 5,000 years before.
 * 2,000 years ago - Judd is released from his capsule, and becomes the judge of the earliest known Turf Wars, probably in the Splatlands, beginning a popular sport that was passed down.
 * 2,000 years ago - The Ark Polaris finally lands back on Earth, all of its crew and animals with the exception of one of the bears died. He when began to explore the planet believing the had reached the spaceship destination, but realizing that he was back on Earth, a planet without any other mammals.

The Great Turf War and surrounding events

 * Before 100 years ago - Inkopolis, the Splatlands and Calamari County are founded. Calamari County's customary chorus is composed to celebrate and respect the bounty of the sea.
 * Around 100 years ago - Cap'n Cuttlefish and DJ Octavio are born. Cuttlefish would become part of the Inkling army and Octavio would become the Octarians' leader.
 * 100 years ago - Sea levels rise again, forcing the Inklings and Octarians to fight over the remaining dry land. Around that time, the Octarians build the Great Octoweapons.
 * During the Great Turf War - Cap'n Cuttlefish forms the Squidbeak Splatoon as its leader, together with two other inkling members, possibly including Sheldon's grandfather, Ammoses Shellendorf, and Judd.
 * During the Great Turf War - Ammoses Shellendorf creates five (or eight) blueprints for weapons, including one for the Hero Shot Replica.
 * During the Great Turf War - The Octarians were victorious through the course of the Great War, aided by their Great Octoweapons. However, a plug being pulled off deactivated their weaponry, allowing their Inkling enemies to prevail and defeat them.
 * After the Great Turf War - The Octarians were forced into hiding into Octo Valley and Octo Canyon, where they built and lived in underground domes.
 * After The Great Turf War - The Great Zapfish is born, and uses its electricity to power Inkopolis and sometimes migrates to Splatsville.
 * After The Great Turf War - Turf Wars start again becoming this time not only a popular competitive sport, but also a form to the inklings to remember their victory.

Events of

 * Around 30 years ago - DJ Octavio begins his career as a disk jockey.
 * Around 30 years ago - The Octarians' underground domes show signs of collapsing, and begin to lose power.
 * Around 26 years ago - Pearl is born.
 * Around 24 years ago - Callie and Marie (Squid Sisters) are born in Calamari County.
 * Around 23 years ago - Marina is born.
 * Around 21 years ago - Agent 3 is born.
 * Around 18 years ago - Agent 4 and Agent 8 are born.
 * Around 18 years ago - Inkopolis hosts its first annual Youth Folk-Singing Contest. Marie and Callie win the contest, and their career and fame as singers begin. Pearl is kicked out of the same contest.
 * Around 7 years ago - Annie, Moe, Crusty Sean, Jelonzo, and Sheldon begin operating their shops at Booyah Base. Spyke also works at a back-alley in Inkopolis Plaza. Squid Squad becomes active, a turning point in Inkling music. After moving to Inkopolis, Marie and Callie also begin their career as announcers for Splatfests and other events in Inkopolis News, as the "Squid Sisters".
 * Around 7 years ago - The Octarians steal the Great Zapfish and other Zapfish from Inkopolis to power their homes and the Great Octoweapons, and prepare for war against Inkopolis. Agent 3 enters Inkopolis, and joins Cap'n Cuttlefish's new Squidbeak Splatoon with Agents 1 and 2, as undercover agents who attempt to rescue Zapfish from the Octarians' control. Agent 3 launches several attacks on Octo Valley to save the Zapfish, and destroy the Great Octoweapons in the process. They also acquire Ammoses Shellendorf's plans afterwards. Cap'n Cuttlefish is abducted and brought to DJ Octavio's lair. Agent 3 fights and defeats DJ Octavio. With the Squid Sisters' help, they bring the Great Zapfish and Cap'n Cuttlefish back to Inkopolis, restoring its power supply. Cap'n Cuttlefish stores DJ Octavio into a snow globe.

Events of

 * Around 6 years ago - Grizzco Industries is founded and managed by Mr. Grizz.
 * The Salmonids migrate to the waters outside Inkopolis as they undergo their Salmon Run for every 70 years. They also prepare to attack Inkopolis.
 * Around 6 years ago - Marina defects from the Octarian army to become a citizen of Inkopolis after listening to the Calamari Inkantation, becoming a huge fan of the Squid Sisters in the process. Along with Pearl, they start their own group, Off The Hook. Flow, Bisk, and Jelfonzo begin operating their shops at Inkopolis Galleria, where Sheldon joins them as he relocates his Ammo Knights shop there.
 * Around 5 years ago: Marie wins the final Splatfest that she and her cousin hosted. No Splatfests occur for a while until the arrival of the new band Off The Hook. Inkopolis Square becomes the new hub for Turf Wars, and Inkopolis News' studio has relocated to one of its buildings.
 * Callie and Marie spend more time apart, in shows and music shows respectively. Marie goes to Calamari County to visit her parents, and returns back to Inkopolis. She then searches for Callie. Marie goes to Octo Valley, and finds that Cap'n Cuttlefish's shack has been abandoned, and the snow globe containing DJ Octavio has been broken. DJ Octavio later gathers the defeated Octarians, and establishes their new base at Octo Canyon.
 * Around 5 years ago: The Great Zapfish is stolen again, plunging Inkopolis' residents into unease. Marie goes to Inkopolis Square to seek a recruit to investigate the Octarians, and find Callie. With the Squid Sisters being absent, Off The Hook enters to take their places as musicians and hosts for Inkopolis News. They also host the first Splatfests since the Squid Sisters' absence. A certain Inkling follows Marie to Octo Canyon, where she appoints them as "Agent 4". Together with Sheldon, the three recover young Zapfish from the resurgent Octarians.
 * Sometime between stages, Agent 4 and Marie receive a com link. The voice sounds suspiciously like Callie... Agent 4 and Marie stumble into Callie at DJ Octavio's stage, where they find that she has been brainwashed under DJ Octavio's control. After freeing her from her brainwashing, she and Callie reunite and perform Spicy Calamari Inkantation, helping Agent 4 defeat DJ Octavio. The Great Zapfish is once again returned to Inkopolis.

Events of

 * Around 5 years ago - Agent 3 and Cap'n Cuttlefish face off against an Octoling, who will later be known as Agent 8, who had a change of heart after hearing the Calamari Inkantation for the first time. The two battled until an unknown assailant captured all three of them and dragged them into the Deepsea Metro. Agent 8 then loses their memories and works alongside Cap'n Cuttlefish to find Agent 3 and get back to the surface.
 * Agent 8 then has to complete a series of tasks in order to collect four Thangs to get to the Promised Land. They then meet C.Q. Cumber, the conductor of the Deep Sea Metro, who explains the functionality of the C.Q. 80 system. Pearl and Marina offer their support from the sidelines. Once Agent 8 collects all four thangs, the telephone assembles the machine that is supposed to bring Cap'n Cuttlefish and Agent 8 back to the surface. This soon proves to be a trap, as the machine itself is actually a blender intended to turn them both into sanitizing ooze. Agent 3 manages to break them out, but at the cost of getting knocked unconscious for a good majority of the final battle. Agent 8 later fights a mindcontrolled Agent 3 and eventually manages to get to the surface to stop the telephone's evil plans. The telephone then reveals itself as Commander Tartar, a sentient AI created by the professor from 12,000 years ago as a last ditch effort to aid the development of the next dominant species. Tartar then strayed from its programming, as it was disgusted by the hedonistic nature of the Inklings and Octarians. It then sought out to create its own 'Master Race' of Sanitized Octarians. After Agent 8 uses Marina's Hyper Bombs and covers the NILS statue completely with ink, Pearl uses her Princess Cannon to finish the job, marking another win for the New Squidbeak Splatoon. Agent 8 joins Pearl and Marina on their way to Inkopolis Square, Agent 3 goes out on patrol and Cap'n Cuttlefish returns to the Deepsea Metro to check in on the Denizens of the deep for just a little longer.

Events of

 * Around 9 months ago - Cap'n Cuttlefish passes his title as Captain to Agent 3.
 * Around 6 months ago - The Great Zapfish gets kidnapped yet again. An Inkling/Octoling goes down a manhole, where they meet Craig Cuttlefish, who dubs them the New Agent 3. New Agent 3 finds DJ Octavio, who's troops have gone missing, and thinks that Cuttlefish was behind it. When New Agent 3 beats DJ Octavio, he confesses and says that he didn't steal The Great Zapfish this time. Before being able to continue the talk, the trio fall down into Alterna. New Agent 3 loses all their stuff, except for Smallfry. New Agent 3 meets Agents 1 and 2, alongside the Captain. Agent 1 introduces the three as the New Squidbeak Splatoon. Agent 2 tells New Agent 3 that the group had found three strong signals on islands called Sites. In a level, the New Squidbeak Splatoon are introduced to O.R.C.A, an AI created by a group of humans to Just as the New Squidbeak Splatoon was leaving the first Site, Deep Cut, consisting of Shiver, Frye, and Big Man, appear and introduces themselves. Shiver and Frye tell Agents 1 and 2 that they are looking for treasure and that they need it. Deep Cut disappears, allowing New Agent 3 to get to the next site. New Agent 3 fights Deep Cut as bosses, allowing for them to use the treasures' pieces to make a lawn mover and get rid of the Fuzzy Ooze by the rocketship. Deep Cut then realizes the misunderstanding, helping the New Squidbeak Splatoon and New Agent 3 to reach the top of the rocket. There they found a dried and semidead Cuttlefish, and met Mr Grizz who was the one behind the Octarian army kidnapping and its fuzzification. Mr Grizz, then leaves with his rocket into space in an effort to cover Earth in fuzzy ooze to return the mammalian balance. Then Captain 3 when seeing Cuttlefish, cries and because of the tear, C.C. revives. Soon after Deep Cut help New Agent 3 to reach space and battle Mr Grizz in his rocket. In the end Mr Grizz releases the fuzz, provoking N.A.3 and smallfry to get thrown into space, being saved by DJ Octavio in his improved mech. Then the final battle to save Earth takes place, with inklings, octarians and salmonids together against the biggest threat, defeating in the end Mr Grizz, who explotes and returning Earth with the Great Zapfish.