Castaway Diary: Portal to the Unknown Isles•02.11.2026, 15:36•Gematsu
Castaway Diary: Portal to the Unknown Isles Early Access delayed to 2027
AI Summary
Developer REMIMORY has officially pushed the Early Access release of their anime-style survival game, Castaway Diary: Portal to the Unknown Isles, to 2027. The team also unveiled a new development roadmap and revealed additional language support along with new themed housing options.
REMIMORY has delayed the Early Access version of “anime-style survival adventure” Castaway Diary: Portal to the Unknown Isles from its previously planned 2026 release window to 2027, as well as announced a four-step roadmap leading up to the Early Access launch. It will be available for PC via Steam. Both Russian and Traditional Chinese will now be supported on top of the game’s previously announced English, Japanese, Korean, and Simplified Chinese language support.
The four-step roadmap is as follows:
“We sincerely apologize for having to announce a delay to everyone eagerly waiting for the game,” said the REMIMORY development team in a press release. “However, to repay the tremendous support you have shown us, we promise to return with an experience truly worth the wait. We will continue active development while communicating closely with players through our Steam Community Hub, so please keep cheering us on.”
Here are the latest details, via REMIMORY:
Castaway Diary: Portal to the Unknown Isles is a bright, casual survival sandbox game following the adventures of girls stranded on an uncharted island. Setting itself apart from conventional grim and tension-heavy survival games, it is designed to offer a relaxed and leisurely island survival life alongside charming anime-style characters—featuring gathering, fishing, and cooking, as well as highly customizable housing, farming, and character customization through crafted outfits. Players can also explore uncharted islands and dungeons on mounts, defeat monsters, and team up in up to four-player online cooperative multiplayer to pioneer the island and conquer dungeons together.
With this announcement, REMIMORY previewed a variety of new housing themes tailored specifically to subculture aesthetics, expanding beyond the basic housing showcased in the initial reveal trailer. Diverse options such as a “School Theme” and a “Maid Cafe Theme” will be available in-game, complete with matching themed costumes. A preview of the newly unveiled housing is showcased in today’s screenshot and new trailer, with more in-depth details to be shared in future official updates.
Watch a new trailer below. View a new set of screenshots at the gallery.
The four-step roadmap is as follows:
“We sincerely apologize for having to announce a delay to everyone eagerly waiting for the game,” said the REMIMORY development team in a press release. “However, to repay the tremendous support you have shown us, we promise to return with an experience truly worth the wait. We will continue active development while communicating closely with players through our Steam Community Hub, so please keep cheering us on.”
Here are the latest details, via REMIMORY:
Castaway Diary: Portal to the Unknown Isles is a bright, casual survival sandbox game following the adventures of girls stranded on an uncharted island. Setting itself apart from conventional grim and tension-heavy survival games, it is designed to offer a relaxed and leisurely island survival life alongside charming anime-style characters—featuring gathering, fishing, and cooking, as well as highly customizable housing, farming, and character customization through crafted outfits. Players can also explore uncharted islands and dungeons on mounts, defeat monsters, and team up in up to four-player online cooperative multiplayer to pioneer the island and conquer dungeons together.
With this announcement, REMIMORY previewed a variety of new housing themes tailored specifically to subculture aesthetics, expanding beyond the basic housing showcased in the initial reveal trailer. Diverse options such as a “School Theme” and a “Maid Cafe Theme” will be available in-game, complete with matching themed costumes. A preview of the newly unveiled housing is showcased in today’s screenshot and new trailer, with more in-depth details to be shared in future official updates.
Watch a new trailer below. View a new set of screenshots at the gallery.
Housing Themes Trailer: Maid Cafe and School
