Alpine Skyline
Alpine Skyline is the fourth Chapter in A Hat in Time, being a large free-roam style map full of mountainous islands each with unique peaks. It is inhabited by varying creatures such as birds, cats, and goats.
Acts
This chapter contains a prelude which is a small platforming map that suppose to act as the main entrance to Alpine Skyline this small region cannot be overcome without the 
Hookshot Badge which is required to play this Chapter, for that you must have already completed The Subcon Well.
Once completed you cannot return to the prelude region again and reentering through the Act Select Menu will send you to The Goat Village instead, additionally no collectibles can be found in this region.
Unlike other chapters, Alpine Skyline acts aren't numbered[1] due to the Free Roam nature of this chapter, however, there's 4 unique monuments in Alpine Skyline: The Birdhouse, The Windmill, The Lava Cake and The Twilight Bell.
All these monuments are connected from a central hub known as The Goat Village which has ziplines that are color coded, taking one of the paths will direct you to the monument and of course a 
Time Piece, reaching the monument's entrance will play a cutscene and then unlock a shortcut to that place from the Act Select menu. The Twilight Bell is locked until the other 3 monuments are completed.
Time Rifts
Layout
Unlike other Chapters before it, Alpine Skyline is comprised of 4 main island-esque mountains, each with its own peak hiding away a Time Piece. These are accessed from a general hub inside the level, due to it's "free roam" formatting, allowing the player to access any of the pseudo-Acts from progressing from the center, or by selecting it from the telescope in the Spaceship once it is completed for the first time. The place in inhabited by the Nomads, who are friendly compared to most of the other characters. An outlier to this format is the finale of the Chapter, The Illness Has Spread.
The Birdhouse
The Birdhouse is the mountain peak of Alpine Skyline led to by a rope with yellow and orange flags. Its entrance island is Bird Fork Pass. The right fork takes you to the Purrloined Village and some Rift Tokens, while the left path takes you to Serpentine Bird Horn, whose eponymous horn will open a path to the next island through is Yellow Band Hills. After clearing that you can reach the rope to the Birdhouse. It contains many wooden hollow houses with many Crows and Shromb Eggs.
The Lava Cake
The Lava Cake is another mountain peak of Alpine Skyline led by a rope with red, yellow, green, blue, and white flags. Later on it has ropes with dark red flags. Its entrance island is Sizzling Lava Split. The next island is Ember Summit. Then rope leading to Lava Cake appears. The Lava cake contains many floors of lava that never drip.
The Windmill
The Windmill is the third mountain peak of Alpine Skyline led by a rope with light blue flags. The entrance island is Goat Outpost Horn. Hat Kid has to clear Goat Outpost Horn, return to the prior island, and use the same rope they returned on, but steering to the left. It leads to Windy Passage, and later, Curly Tail Horn Trail. The Windmill contains a vertical climb with many moving platforms for Hat Kid to go through.
The Twilight Bell
The Twilight Bell is the fourth mountain peak of Alpine Skyline led by a rope with green and green-blue flags located at the top of the main land. Its entrance island is The Twilight Path. The next island has the Twilight Bell, where Hat Kid must swing the handle of the bell three times. It then will create a Dweller dimension for Hat Kid to traverse. The Twilight Bell requires the Dweller Mask, and the Sprint Hat is also recommended.
The Illness has Spread
Like other Chapter Finales, it requires each of the other peak's Time Pieces to be reclaimed before it can be accessed. Unique to other Finales however is that because Alpine Skyline returns the player to the beginning of the level upon acquisition of a Time Piece rather than return to the Spaceship, it can be started immediately after the player has collected the final peak's Time Piece.
Unlike the other mountain peaks, The Illness Has Spread takes place in an alternate variant of Alpine Skyline unique to its Act, spanning most of the center mountain and using short offshoots from the ropes leading to the other peaks that were previously inaccessible due to flying seedlings that can be used in conjunction with the Hookshot Badge to swing across large gaps.
Paths directly to other peaks are blocked off by spiny and damaging flowers, limiting the choices the player has in terms of exploration. Completion is based on defeating all of the large flowering buds that pollute the air with more seedlings and corrupt the Goats, returning the skyline to its prior state once each bulb is defeated. Once all the bulbs are gone, a Nomad will reward you with the Time Piece.
History
As seen in the Storybook for Alpine Skyline, one goat was led by a constellation to find an area to settle on. After some time, the goat finds Alpine Skyline and an enormous star above the highest peak. The goat made its path toward the summit, and at the summit it became one with the sky and turned into a constellation.
With the second Storybook introduced in the Seal the Deal DLC, the Nomads inhabited and colonized Alpine Skyline alongside the goats.
Characters
Achievements
Below is the list of achievements related to this chapter;
| Achievements | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Do 5 homing attacks in a row, without touching the ground! | ||||||||||||||||||||||
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The Floor is LavaMedium Complete the Lava Cake peak without touching the lava at all!
| ||||||||||||||||||||||
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Collect all Time Pieces in Alpine Skyline! | ||||||||||||||||||||||
References
- ↑ They are numbered in the source code, but the localization of each act doesn't show their number, Free Roam is
99, rest are Act1to5.