After following him through a manhole in Inkopolis Plaza, the player arrives in Octo Valley and meets Cap'n Cuttlefish outside his shack. He recruits the player as Agent 3, as part of the New Squidbeak Splatoon in order to steal back the Great Zapfish from the Octarians. The player goes through completing levels and defeating the Great Octoweapons. After defeating The Rampaging Octowhirl!, Cap'n Cuttlefish gets kidnapped, and soon comes in contact with Agents 1 and 2. Agent 3 soon completes all the levels in Octo Valley and battlesDJ Octavio. Agent 3 defeats him and rescues Cap'n Cuttlefish and the Great Zapfish. DJ Octavio is placed in a snow globe outside Cuttlefish's shack. Replaying the final battle shows a scenario where DJ Octavio has escaped from his snow globe and captured Cuttlefish again.
Splatoon 2
The Squid Sisters Stories reveals that shortly before the events of the game, Marie returned to Octo Valley to find the snow globe destroyed and DJ Octavio missing.
In the game, however, Octo Canyon replaces Octo Valley as the single-player hub, and therefore does not appear and is never mentioned.
In the Octo Expansion, Cap'n Cuttlefish claims that Agent 8 and Agent 3 were battling in Octo Valley before being attacked and kidnapped. Marina also notes that she and Pearl are communicating with Cap'n Cuttlefish on Mount Nantai, which he states is nearby Octo Valley.
Description
Octo Valley is a large, outdoor area surrounded by mountainous formations and octopus-shaped rocks. There are several waterfalls in Octo Valley. It is the home base of the Octarians, and is where single-player missions can be accessed. The player can enter Octo Valley via a manhole near the front of Inkopolis Plaza or by tapping "Octo Valley" on . Under Octo Valley is a collection of many large Octarian domes, their interior walls covered with screens that display images of the surface. There are 33 Kettles scattered across the valley that will take players into these domes when they go through their grated surfaces in squid form. It has five areas, each connected to each other by Inkrails, except for the fifth area, which has blocks that need to be jumped across. Each level in an area can be completed in any order. Once all levels have been passed, the boss kettle for each section will open. The boss will need to be defeated to disable the power plug for the force field, which blocks the Inkrail to the next area.
Cap'n Cuttlefish appears to reside in Octo Valley, as players encounter him standing outside a shack decorated with a large map. From here, players assume the role of Agent 3 and join Agents 1 and 2 in locating and defeating the Octarian army. Upon defeating DJ Octavio, he will appear inside a snow globe next to Cap'n Cuttlefish's shack, along with a floating credits board allowing the player to view Splatoon's credits again. When the snow globe is hit with ink, DJ Octavio will cower and give off a purple glow. Both he and Cap'n Cuttlefish will turn to look at Agent 3 whenever they approach.
Area 1: Area 1 is located on top of a building, containing the entrance to Octo Valley as well as Cap'n Cuttlefish's shack. It is the smallest area, only containing three kettles and one boss kettle.
Area 2: Area 2 is on top of a metal frame, and has curved terrain resembling a skatepark. The boss kettle is on a tower similar to the one at Blackbelly Skatepark. It has six kettles and one boss kettle.
Area 3: Area 3 floats in the air. At the centre is a large tower, containing the boss kettle at the top. It has six non-boss kettles, many of which require moving up walls to reach.
Area 4: Area 4 is accessible by Inkrail and Propeller Lift from Area 3. It is made up of a large floating platform, which has square holes in it which lead to platforms below. It has three transmission towers, which contain kettles. There are several Gushers and Inkrails. The area has six kettles and one boss kettle.
Area 5: The final area, Area 5, is a large platform with many floating blocks in the air. There are two ways to get up. On the right-hand side, there is a grate which goes behind the area and leads to a Propeller lift, taking the player up to the platforms in mid-air. The second way to get up is by an Inkrail near the back. In this area there are lots of sponges, Propeller lifts, and Inkrails. Once the player gets to the top, they can access an Inkrail that leads to the ground. There are six kettles in this area. The final boss kettle is located on a UFO flying above Octo Valley, which is reached by using a Launchpad found at the highest point in the area.
Once the player enters Octo Valley, they can access the Octo Valley mode. From there, they can play 32 different missions (including boss battles) that feature various singleplayer-only mechanics such as Inkrails, sponges, and Balloon Fish.
"Th-th-the... Oc-Oc-Oct... The Octarians are coming! NOOOOOOOOOOOOOOOOOOOO! Oh, uh, hi... Guess I lost my cool for a minute there! I'm Cap'n Cuttlefish, leader of the legendary Squidbeak Splatoon! That look in your eye... It's the look I've been lookin' for! The Great Zapfish that powers Inkopolis has been squidnapped! Nobody believes me, but it's the work of the Octarians! I just know it! They want revenge for the Great Turf War of 100 years ago! I've been keepin' an eye on them this whole time, of course... But they stole the Great Zapfish right out from under my nose! Please! You gotta help me rescue the Great Zapfish! ... ... ... So... I'm gonna take your silence as a yes. Starting today, you are Agent 3 of the New Squidbeak Splatoon! This is your brand-new Hero Suit! It'll help you fight the Octarians. What a great fit! (For a hand-me-down from Agents 1 and 2...) Now let's go get those Octojerks! I'm countin' on you, bucko!"
Tap revealed kettles on to Super Jump straight to them!
”
“
Tap Upgrade Gear on to spend Power Eggs and power up your gear!
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Shoot ink () to reveal the entrances to the Octarian lair!
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Dash () and jump; dive to hide. Using ink () is key to victory!
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“
It's so warm here... Makes me wanna take a nap...
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“
Zzzzzz... Hu-WHA?! No, I wasn't sleeping. I was just... resting my brain.
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You kids think you're sooo fresh, but ya can't touch my squidstyle!
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That Hero Suit really... suits you!
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Rescue all the little Zapfish first, then save the Great Zapfish!
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I can't produce much ink at my age... That's where you come in!
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I may be old and crusty now, but I used to be quite the looker!
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I guarantee you the Octarians are behind that UFO crash!
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All the young 'uns in town don't believe me about the Octarian threat. Well, WHO'S CRAZY NOW?!
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You know, bucko... You remind me of my grandsquids.
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That look in your eyes reminds me of carefree bygone days... *sniff*
”
Talking to him after defeating DJ Octavio
“
Hey there, bucko! Been kickin' tail in the Turf Wars?
”
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Been battling online at all lately? If so, I hope you've been winning!
”
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You're lookin' good these days, but I'm still the freshest around!
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Back in the day, I was the best battler Inkopolis had ever seen!
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Zzzzzz... Take that, Octojerk... WHA?! Aw, fiddlesticks... You woke me up!
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With DJ Octavio bottled up here, the Great Zapfish is finally safe!
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We gotta keep this Zapfish fiasco a secret. Wouldn't want to spoil my best-selling tell-all!
”
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Did I ever mention that Agents 1 and 2 are my grandsquids?
”
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My grandkiddos brought me lunch yesterday. They're the best!
”
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There be a storm a-brewin'... I can feel it in me cuttles!
”
Europe and Oceania
Following him to Octo Valley for the first time:
"Th-th-the-! Th-the Oc- Oc- Oc-... The Octarians are coming! Ahh! I'm sorry, I lost my cool for a moment there! I'm Cap'n Cuttlefish, leader of the legendary Squidbeak Splatoon! That look in your eyes... I've been waiting for a young 'un like you! The Great Zapfish that powers Inkopolis has vanished! And though nobody will believe me, it's the work of Octarians! They're after revenge for their defeat in the war 100 years ago! I was keeping a watchful eye on them myself, of course... But they stole the Great Zapfish from right under my nose! Please! You must help me recover the Great Zapfish! ... ... ... ... ... ... I'll take your silence to mean, 'yes, of course I'll help!' Starting today, you are Agent 3 of the New Squidbeak Splatoon! Take this special Hero Suit - it will help you withstand their ink! What a perfect fit! (For a hand-me-down from Agents 1 and 2...) Now, let's go beat those nasty Octarians! I'm counting on you!"
(ZL Swim and jump, dive and hide… Skillful Inking with ZR is the quickest way to victory.)
Talking to him after defeating DJ Octavio
「オクタリアンにデンチナマズを うばわれとった事… ワシらだけの秘密じゃ」
(The fact that Octarians took the Zapfish is… just between us.)
「DJタコワサ将軍が ここに居るからには もうデンチナマズは ぬすまれんじゃろ」
(As long as DJ Octavio is here, I guess the Zapfish won't be getting stolen anymore.)
「3号よ、ナワバリバトルに はげんでおるか?」
(Agent 3, are you doing well in your Turf Wars?)
「バトルで困ったら 「戦場の鉄則」を 思い出すんじゃ」
(If you get cornered in a Turf War, remember the "Rule of the Battlefield".)
「1号と2号はイカにも、ワシの孫じゃ ………言っとらんかったかいの?」
(Agents 1 and 2 are actually my grandkids. ………Did I tell you that already?)
「1号2号は 仕事がいそがしいらしいからのゥ ………してきゃつらの仕事は何じゃ?」
(Agents 1 and 2 seem busy with their jobs. ………Wait, what are their jobs?)
「こう見えても昔、 戦場では ブイブイ言わせたもんじゃ」
(I don't look like it now, but I was great on the battlefield way back when.)
「この服か? ビンテージっちゅうんじゃ せくしーじゃろ?」
(These clothes? They're vintage, aren't they sexy?)
「風が……ふいておる」
(The wind... is blowing.)
「………………………………………………… …おぉ、 ねとったわィ」
(……………………………………………………Oops, I was asleep.)
Trivia
Octo Valley can be seen in a map that appeared in a Splatoon 3 developer interview.
The official Japanese Splatoon Twitter account stated that Octo Valley "was made using the remains of an ancient civilization. It seems to be using very familiar things... or is it just my imagination?" This was an early hint that Splatoon's events take place on Earth, long after humans have gone extinct.[1]
The Art of Splatoon has a comic about Splatoon's backstory, revealing that the Octarian domes were originally built and used by humans as a means to survive the rising sea levels before they eventually died out. The Octarians seem to not know that the humans created the domes in the comic.
In various parts of Octo Valley, it is possible to see Inkopolis off in the distance, as well as a huge rock formation that resembles an octopus.
Unlike nearly every other area in Splatoon, Octo Valley is not set at night during a Splatfest.
Area 1 of Octo Valley is on the top of a building.
In the Splatoon manga, there is a panel in chapter 25 showing the location of Mount Nantai in relation to Octo Valley, with the mountain being close to the octopus rock formation found in Octo Valley, but separated by water.