Optional content worth doing
The optional layer is coin rooms, the Boguin cannon challenge, Bomboman's drum song, the hot spring scene and three Golden Disks. The disks are the only optional chain that unlocks a new location, the Eternal Sanctuary.
Owlboy has no quest log and no markers, but it does have an optional layer: a hot spring, a drum kit, a cannon minigame, three Golden Disks and a shop full of trinkets. None of it is required to finish the story. Some of it is required for 100%, and one chain unlocks a location that changes how the ending reads.
This page lists the optional content by payoff, with what it takes and when to do it.
The optional content at a glance
| Optional item | Where | Requirement | Reward |
|---|---|---|---|
| Hot spring | Vellie | None | Permanent health increase, Hot Spring Mastery |
| Bomboman's drums | Vellie | Jump the bongo sequence | Music Master, a key for Mesos |
| Boguin cannon | Tropos | Rescue two Boguins | Flight of the Boguin achievement |
| Golden Disks | Owl Temple, Strato, Floating Tower | Reach each area | Ancient Memories, Eternal Sanctuary |
| Trinkets and hats | Buccanary's shop | Coin totals | Health, range, damage, cosmetics |
| Eternal Sanctuary | Tropos | All three disks placed | Hologram lore |
The first two are in Vellie and take minutes. The disks are the only chain that spans the whole game, and the sanctuary is the only optional location.
The hot spring
Toby sits in the hot spring in Vellie and teaches Otus to cope with the heat. The scene is short, it is easy to walk past, and it grants a permanent life increase plus the Hot Spring Mastery achievement. It is one of four health upgrades in the game; the other three are the canteens in the shop, covered on the health upgrades page.
Do it on your first visit. After the evacuation the dialogue changes and the scene is harder to place in the story.
Bomboman's drums
Bomboman keeps bongos in his house and more bongos outside. Jumping on them in a specific sequence plays Otus's song, unlocks Music Master, and produces a key. The key is for a secret in Mesos, which is why the drums are worth doing even though the achievement is the obvious reward.
The sequence is short and forgiving; if you are stuck, the pattern is the melody, not a random order. There is no penalty for getting it wrong.
The Boguin cannon
One Boguin in Tropos asks you to find two of his brothers. Rescue both, and the cannon minigame unlocks. Clearing it grants Flight of the Boguin, which Steam lists at an 8.4% global unlock rate.
It is the only achievement tied to a minigame and the only one that can be missed by not talking to an NPC. Do it when you first arrive in Tropos, before the temple.
The Golden Disks
Three disks, three locations, one new area:
| Disk | Location | How to find it |
|---|---|---|
| 1 | Owl Temple | Behind a hidden wall near purple vines; jump the waterfall past the Wards |
| 2 | Strato | Through the thorns, top-left path at the circling Spikeballs, inside a pink-leafed tree |
| 3 | Floating Tower | Right path at the spinning-platform fork, in a grand room |
Placement is a separate step. Two go in Tropos, two screens right of the Legendary Adventure Emporium. The other two go in Strato: one past the Levigates and up a waterfall, one above the same sign to the left past the spores. The doors only open once all three are placed.
Inside, the Eternal Sanctuary holds holograms of the Ancient Owls, including Surnia, Aegolius and Noctae. The story page uses their dialogue; the endings page explains why the last hologram matters.
Trinkets, hats and the coin cleanup
The shop is covered in detail on the coins page. The optional part is the hats: three cosmetic items that fall off when you take damage. They cost 500, 1000 and 1750 coins, and they are the last thing to buy.
The Spectre Cloak is the completionist item. It requires every coin in the game, and it changes movement: faster flight, wider spin and roll. It is not needed for the story or for the tower.
Is any of it worth skipping?
Skip the hats if you are short on time. Skip the cannon if you do not care about achievements. Do not skip the hot spring or the drums: one is a permanent health increase and the other is a key that opens a scene in Mesos.
The disks are a judgement call. They cost a detour in three areas, and the reward is lore rather than power. If you care about the story, they are the best optional content in the game.
How the optional layer fits the story
The optional content is not filler. The hot spring is the game's first quiet character scene, and it establishes Toby as the person who remembers Otus being born. Bomboman's drums are the only piece of Vellie culture you can interact with. The Golden Disks are the backstory of the Ancient Owls, told in their own words rather than through a narrator.
That is why the disks are worth the detour even though the reward is not power. The main story tells you what the Hex Machine did; the sanctuary tells you what the owls thought they were doing. The difference matters for the ending, and the story page leans on both.
The cannon minigame is the one piece of pure content with no story weight. It is a challenge, an achievement and a distraction. Skipping it costs you nothing but the achievement.
What the sanctuary adds
The Eternal Sanctuary is a small location with several holograms. Surnia introduces the archive; a combat instructor talks about the Temple Guardians; a broken hologram talks about the machines; Aegolius and Noctae explain the Hex. The dialogue is the game's only direct explanation of the Loop, and it is deliberately partial: the holograms are recordings, not answers.
If you finish the game without the disks, the ending still works, but the final scene with Asio reads as a twist rather than a conclusion. With the disks, it reads as the last piece of a pattern the owls already suspected.
_Checked 2026-11-03 against the community documentation for the hot spring, Bomboman, the Boguins and the Golden Disks, and the official achievement list._