On this page, I will yap about the lore of Splatoon and how it's really cool and interesting and 'fun'.
⚠ SPOILER WARNING!!! SPOILER WARNING!!! SPOILER WARNING!!! ⚠
So basically it's the present, and humans are living peacefully on earth. Until in a world war, a nuclear bomb was dropped on Antarctica, causing various natural disasters to occur like volcanic eruptions and dramatically rising sea levels which killed almost all the life on earth.
Luckily, the humans built a safe underground haven under what was once Mt. Fuji, it's name was Alterna. Alterna's scientists created many innovations, one of those being liquid crystals from the bodily fluids of squids that could basically read people's minds and change color in response. They even lined the ceiling of the dome with the crystals which turned sky color because of the humans desire to see earth again.
Eventually, the new generations of scientists got way too curious and they decided to launch a rocket up into the sky to see earth's surface. During the first launch test, the rocket boosters had so much energy that it overloaded the liquid crystals which caused the stone walls to break and rain debris on Alterna.
After the collapse of Alterna, the sea creatures in Alterna's waters started to absorb the liquid crystals with the humans's wishes of returning to earth, passing them onto the sea creatures. The liquid crstals also rapidly advanced the sea creatures' evolution process enough that the squids eventually started to walk on dry land. The area surrounding Alterna is called the Splatlands.
2000 years ago: The earliest ancestors of the Inklings started creating civilizations similar to ancient Egypt.
The sea levels started to rise again, causing the Inklings and Octolings to fight over the small amounts of land causing the Great Turf War to start.
The Octarians were victorious in the first battles because they had very advanced weaponry... and the Inklings didn't wake up early enough in the morning to fight back. However, as the Octarians stormed the Inklings central stronghold, they unplugged a power cord which leaded to all their mechinery being deactivated, which let the Inklings defeat them.
After the Great Turf War, the Octarians were forced into Octo Valley and Octo Canyon and the Great Zapfish was born, with its electricity being used to power the city.
ok i'll finish this later, if u want more, go to splatoonwiki.org