Isle of Fall is a Ren'Py adult visual novel by No Try Studios, using animated 3D CG visuals. You play Satoshi, a man whose planned summer trip with his girlfriend Mary and uncle Kendo falls through. Months later, Kendo sends an unsettling email about the Naval Treasure Resort’s autumn Test of Courage on a deserted island, promising couples a ritual that binds them forever. Hoping to revive his stagnant relationship, Satoshi accepts, bringing Mary, their friend Hanako, and the couple Natsuki and Yoshi. The story mixes Halloween costumes, suspense, and unavoidable NTR as strange attendants, a cursed mansion, and a clouded mind turn the trip into a dangerous test of love and temptation.
The current build is v0.6, released on December 9, 2025, and development is ongoing. It runs on Windows, Linux, Mac, and Android in English, with uncensored content. The v0.6 changelog is marked N/A. Earlier v0.5 notes describe continued story scenes for Mary, Natsuki, and Hanako, new animated renders, extra dialogue, and angle toggles for some scenes.
Developer's description
Satoshi and Mary are a couple in love. They were meant to spent a lovely summer together at a certain summer resort, along with Satoshi's uncle, Kendo... However, Kendo is unable to go, and their plans are cancelled.
Several months later, Satoshi receives an eerie email from his uncle. In it, Kendo explains how during the Fall season, the Naval Treasure Resort hosts a one-of-a-kind Test of Courage, at a nearby abandoned island. Couples who successfully complete this test are made to participate in a ritual, which is said to bind two people in love for all eternity. Feeling that his relationship with Mary is on the road to stagnation, Satoshi accepts the invitation.
Thus begins a kinky, fun-filled Halloween adventure for Satoshi and Mary, along with their friend Hanako and fellow couple Natsuki and Yoshi! Sexy costumes, sexy times, all alone in a deserted island!
...Or that's how it was meant to be.
More
Spoiler
But once they reach the island, Satoshi is quick to realize that things are a bit... off. Within the confines of an old Japanese mansion, where the Test of Courage is meant to take place, strange events keep happening out of sight. The attendants who are hosting the event waste no time in getting closer to the women of the group... perhaps with more sinister objectives in mind.
The women don't seem to mind their advances... and Satoshi feels his mind clouded, unable to tell whether the kinky events he keeps finding his girlfriend and friends tangled in are true, or just figments of his imagination.
But quickly, it becomes evident that this Test of Courage is anything but innocent... and that the ritual that's meant to happen at the end might not serve the purpose they were told.
And at the center of everything is a certain attendant, whose watchful eye seems to have taken an interest in Mary's body... and soul.
Will Satoshi be able to uncover the truth behind this ritual, of the spell that has been cast over his clouded mind, and escape that island with his girlfriend's innocence intact?
Or will Mary fall for the relentless devil of temptation that resides within that cursed island?
...Well, this is an NTR story. So of course, the latter!
(This game contains
UNAVOIDABLE NTR
)
v0.6
N/A
v0.5
Continuation of prior events.
1 dedicated story scene per heroine (Mary, Natsuki, Hanako).
1 Hanako build-up scene.
1 Natsuki build-up scene.
2 Hanako h-scenes.
2 Natsuki h-scenes.
2 Mary h-scenes (one of them extra long).
1 short, repeatable group h-scene.
Certain scene have been given a "change angle" toggle at the end to cycle through animations and enjoy them at your own pace.
200+ new CGs/renders (including variations).
70+ new animation/videos (including variations).
20k+ words of dialogue and narration.
v0.4
More story developments.
Mary map events:
1 Mary x Ayumu h-scene (unlocked after talking to Mary at the beginning of the update).
Hanako map events:
2 Hanako x Mirio h-scenes.
2 repeatable variations after checking their respective icons.
Natsuki map events:
1 Natsuki x Ayumu short h event.
1 short Ayumu x Hanako h-scene.
1 longer group (Ayumu / Mary / Hanako / Natsuki) h-scene, divided in 3 parts.
1 final Ayumu x Mary h-scene.
No new collectable fragments added.
No new maps.
Rewards still cannot be collected for Fragments.
An issue in which sounds would not play properly in certain maps has been resolved.
200+ new CGs/renders (including variations).
50+ new animation/videos (including variations).
25k+ words of dialogue and narration.
v 0.3
More story developments.
New maps to explore: the basement and its 2 rooms.
Mary map events:
2 Mary x Ayumu h-scenes (activated as you walk across the map).
1 non-h scene if you check on them after completing the first task.
Hanako map events:
4 Hanako x Mirio short h-scenes.
3 repeatable variations after checking their respective icons.
Natsuki map events:
4 Natsuki x Daiki short h-scenes.
3 repeatable variations after checking their respective icons.
1 longer Ayumu x Mary h-scene.
1 final Natsuki-centered h-scene to cap off the update (other girls play a role too).
No new collectable fragments added (coming next update!)
Rewards still cannot be collected for Fragments.
An issue in which sounds would not play properly in certain maps has been resolved.
260+ new CGs/renders (including variations).
85+ new animation/videos (including variations).
28k+ words of dialogue and narration.
v0.2
More story developments.
New map to temporarily explore: hotsprings.
1 new Ayumu x Rin h-scene (Takumi is present too.)
Mary map events:
1 Mary x Ayumu h-scene, with two parts depending on progress.
2 repeatable variations after checking their respective icon.
Hanako map events:
1 Hanako x Mirio h-scene, with 3 parts depending on progress.
2 repeatable variations after checking their respective icons.
Natsuki map events:
1 Natsuki x Daiki h-scene, with 3 parts depending on progress.
2 repeatable variations after checking their respective icons.
1 more Ayumu x Mary h-scene to cap off the update.
From the 3rd Test forward, you can interact with the mirror icon to talk to a Mysterious Person, who will ask you to gather Fragments.
Fragments can be gathered across specific maps by finding hidden icons and answer King of Summer-related questions. A total of 5 can be found, counting the story-mandatory one.
As of now, rewards can't be exchanged for collected Fragments (this is coming out next update).
An issue in which sounds would not play properly in certain maps has been resolved.
The amount of waypoint markers has been decreased per map, so traversing isn't so slow.
The clickable size of waypoint markers has been increased.
150+ new CGs/renders (including variations).
55+ new animation/videos (including variations).
25k+ words of dialogue and narration.
v0.1- Initial Release
Initial release of 'Isle of Fall'.
Halloween/Horror-themed spinoff of 'The King of Summer' (not strictly necessary to have played the original game to play).
NTR content focused on finding events across interactable maps, with Mary, Hanako and Natsuki each being paired up with a different antagonist.
Find these events, participate in hide-and-seek segments, avoid (or trigger on purpose) Bad Endings! Although events will still progress to have our protagonist lose his love interests little by little.
Introduction of a new antagonist:
'Ayumu'
.
Re-introduction of two antagonists, formerly known as part of the Bro Gang:
'Mirio'
and
'Daiki'.
Currently 6 scenes to find across 2 exploration segments, with each scene having 1 or 2 extra stages, triggered by continuous interaction with their icons.
1 Bad Ending featuring 3 smaller sex scenes. If you're looking for the actual deed, try and trigger it!
29k words of narration and dialogue.
350+ new renders (including variations).
40+ new animation cycles (including variations).
There are a lot of typos in the current release. Please excuse them, they'll be fixed.
Player reviews
Player rating5.0 / 5 · 9 ratings
Written reviews9 · avg 3.4★
Positive (4–5★)56%
Latest review2026-02-11
What players say
Five positive reviews, one middling, and three negative reviews give a mixed overall reception.
5★5
4★0
3★1
2★0
1★3
Players like
Hidden NTR buildup and content are praised
Map travel and scene discovery feel engaging
Familiar cast in a new setting works well
Improved character models and animations are praised
Common complaints
Story feels incoherent and lacks meaning
MC is weak and lacks player agency
Adult scenes are weak and repetitive
Best for players who enjoy hidden NTR and familiar spinoff characters.
Summarised from 9 written player reviews.
Ggzao2026-02-11★★★★★
horrendous Game, weak mc characters are brain dead and the story is meaning less, dont understand how a game with good animation can be that bad, the gameplay also sucks, it would be better if it ones a linear story
Gari Fuze2026-01-16★★★★★
Weird UI/Interface, this is my biggest issue with this game, it is a linear VN with an extra twist, you have to click some small circles to move somewhere, and then to click view a scene. The location is further…
MilkyWay52025-09-09★★★★★
Intro: review version: 0.4 This is a fairly standard NTR VN with fantasy elements where you play from the male protagonists' POV, the character being stolen is the gf. This game being a spin-off of this dev's other game, King…