Unwelcome Flying Object
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Unwelcome Flying Object
~ Underpass Infiltration ~
~ Underpass Infiltration ~
| Number | 21 |
| Area | 4 |
| Sheldon's Request | |
| Items | 1scroll, 2armor, 1Bomb Rush, 1Inkzooka |
| Music | Inkstrike Shuffle |
| amiibo challenges |
Unwelcome Flying Object is the twenty-first mission available in single-playerOcto Valley. It takes place in a modified version ofUrchin Underpass, a multiplayerstage.
Octo Valley
Mission 21 can be found on the tower further away from the entry ofArea 4. There are two ways of getting to Mission 21:
Option 1: Head to the tower on the right, there should be a geyser underneath the tower and anInkrail when taken theGusher. Activate it and fall down the hole.Agent 3 will be placed to where Mission 19 is located, and there is a Propeller-Lift to take. Use the Propeller-Lift and it will take Agent 3 to a long cube platform with an Inkrail installed. Use the Inkrail and it will take Agent 3 above Mission 21. Slip through the grate in squid form and Agent 3 will find the kettle to Mission 21.
Option 2: There is a shortcut that can be taken underneath Area #4, when close to Mission 16, perform a swimming squid jump to the long cube platform. Use the Inkrail on the cube and it will place Agent 3 above mission 21. Slip through the grate in squid form and Agent 3 will find Mission 21.
Stage summary
| Enemies | |||
|---|---|---|---|
| Enemy name | Image | Locations and total found | |
| Octocopter | Beginning Area Checkpoint 1 | 1 3 | |
| Octodiver | Beginning Area | 3 | |
| Octoball | Checkpoint 1 | 2 | |
| Octotrooper | Checkpoint 1 Checkpoint 2 UFO Base | 2 2 12 | |
| Twintacle Octotrooper | Checkpoint 1 Checkpoint 2 | 2 2 | |
| Octobomber | Checkpoint 2 | 3 | |
| Octostriker | UFO Base | 1 | |
| Items | |||
| Item name | Image | Locations and total found | |
| Armor | Beginning Area | 1 | |
| Canned special | Checkpoint 1 Checkpoint 2 | 1 1 | |
| Sunken Scroll | Checkpoint 2 | 1 | |
| Features | |||
| Feature name | Image | Locations and total found | |
| Sponge | Checkpoint 2 | 2 | |
| Launchpad | Checkpoint 2 | 1 | |
| Inkrail | UFO Base | 1 | |
Agent 3 must travel throughUrchin Underpass while fighting various Octarians and avoiding the Octostriker's attacks. At the end of the stage there is a launchpad going up to the UFO, where Agent 3 faces the Octostriker.
Collectibles
Sunken Scroll

| “ | What is this? It looks like the proprietor of that shoe shop! Could there have been an ancient creature that consumed prawns as food?! A terrifying thought indeed... | ” |

Location: At the Northeastern part of the map at the end of a side path. Go through the level normally until you reach thecheckpoint just after the central area of the map. Take a right through the wired fence and continue down that path. Defeat theOctarian along it and grab the scroll.
Armor

Location of Armor 1:

Location of Armor 2:
Special Weapons

Location of Inkzooka:
Quotes
Agent 1's Quotes
Gallery
Level icon
In-game map
Checkpoint 1-Enemy Octodiver Close-up
Checkpoint 3-EnemyOctobomber
Checkpoint 3-EnemyTwintacleOctotroopers
Giant Octarian UFO
Mission End
Trivia
- Even after the changes made toUrchin Underpass inVersion 2.0.0, the map's layout for the mission remained the same as the old version.
Names in other languages
| Language | Name | Meaning |
|---|---|---|
| ほんとにUFOは実在した! ~追跡! デカライン高架下~ Honto ni Yūfō wa Jitsuzai Shita! Tsuiseki! Dekarain Kōkashita | UFOs are Realy Existent!: Pursuit! Urchin Underpass | |
| - Passage Turbot - Tenace, la menace ! | - Urchin Underpass - Tenacious, the menace ! | |
| Unschönes Flugobjekt über der Dekabahnstation | Unpleasant flying object over Urchin Underpass | |
| Essi imbrattano: attacco alieno alla città! | They stain:[1] alien attack on the city! | |
| Objeto volador fastidioso ~ ¡Avistamiento en el parque! ~ | Bothersome Flying Object ~ Sighting in the park! ~ | |
| ¡El ovni contraataca! Amenaza bajo el viaducto | The UFO counterattacks! Threat under the viaduct |















