GameDailys Editorial · October 31, 2026

miHoYo has set December 4 as the open-beta date for Petit Planet, its cozy life sim, and the date now sits in the title of the game's official Chinese-language site[1]. Coverage of the October 30 announcement adds the platform list: Windows, iOS and Android, with one account working across all three[2]. What that record does not yet include is an English-language date: miHoYo's own English site still advertises only Coziness Test sign-ups[3]. For players who read English, the state of play on October 31 is a confirmed game with an unconfirmed local date. That makes November 1, the day of the official preview show, the first date worth marking.

December 4 opens the service itself

The official Chinese site headline reads: open beta begins December 4, pre-register for rewards[1]. A same-day news report (DoNews, October 30, 11:29 as posted) says miHoYo formally set the open beta — 公测 — for December 4, and its release description lists Windows, iOS and Android with account interoperability across the three[2].

公测 in a free-to-play launch is the stage where the service opens to the public. The game's own history marks the difference. Its first test wave, 宜居测试, recruited players through the official CN sign-up page in September 2025 and accepted PC and iOS players only, per sign-up coverage dated September 26, 2025: that wave offered a chance at test access. A dated open beta with pre-registration rewards is the stage after that: pre-registration is open to anyone who signs up, and the reward is exclusive items when the open beta arrives. The same report records a public-beta trailer (公测PV) released alongside the date, with the game still described as being polished[2].

What Petit Planet is, by its own channels

The English name is Petit Planet: HoYoverse's English official site carries that title[3]. The description on the game's CN distribution page, the 九游 listing, presents a small-planet life sim: a planet of your own to build and decorate, boat travel across a star sea, fuzzy neighbors to invite in, and a street market where travelers from different planets gather; the daily loop covers insect-catching, fishing, farming and beachcombing, with terrain shapes you can rework as friendships deepen[5]. The announcement report's summary matches that scope: a star-field pastoral setting, multiplayer at the street market[2].

Who makes and releases it: the store copy names miHoYo as the developer[5], the game's encyclopedia entry describes a free-to-play, cross-platform slow-life sim with HoYoverse as global publisher[6], and Baidu Baike records the domestic online-game license approval on July 22, 2024[7].

Where PC stands, and the step available today

The reported launch set includes a Windows client[2], and that platform has history behind it: the September 2025 test wave accepted PC players[4], so the Windows entry continues a platform the game already runs on. The mobile side shows directly on the store listing: TapTap carries the game under Android and iOS tags, with the publisher operating its board and about 1.46 million followers on record as of October 31[8]. Pre-registration is open there (the listing is an official pre-registration page), and the reward mechanics come from the official sign-up coverage for the first test: pre-register, and the reward is exclusive items for the future open beta[4]. The step is available now, and the exclusive items arrive with the open beta.

Every documented pre-registration channel is a Chinese-language page: the official zh-cn site's sign-up, the TapTap CN listing and the 九游 store page[1][8][5]. The English site's only step today is the Coziness Test sign-up[3].

No console version has been announced; Windows, iOS and Android is the set the October 30 report carries[2].

What the announcements do not yet say

CN portal copy for the game (vendor store copy on its 九游 distribution page) states a December 4, 2026 global launch, as the page stood on October 31[5]. miHoYo's English official site, as of October 31, still headlines the Coziness Test sign-up phase and shows no launch date[3]. Until the English-language channels carry the date themselves, December 4 is the open beta of the Chinese service, which portal copy extends to "global". The English site names the game and the sign-ups; no date appears there.

The account-interoperability claim, one account across Windows, iOS and Android, traces to the same October 30 report[2]. And the open beta's content scale is unpublished: a trailer is out[2], but no source states what the December 4 build includes. The gap matters for timing: a Western player who pre-registers today is signing up for a reward whose delivery date no English-language source has stated[3].

November 1, 19:00 (Beijing time), and what it can settle

The publisher has scheduled an open-beta preview special — 公测前瞻特别节目, a broadcast ahead of the December 4 opening — for November 1, a Sunday, at 19:00 Beijing time, as posted on the game's official TapTap board[9]. The board is the publisher's own: four official staff accounts, about six thousand posts, and a game page counting about 1.46 million followers and 2,145 player reviews[8][9]. The questions the announcements left open are what to watch the show for: whether the global service gets a date, and whether that date matches December 4; an official word on the platform set, including where the Windows client will be distributed; the launch content the trailer withheld[3][2].

The Chinese-language record confirms a December 4 open beta; the Windows, iOS and Android set with shared accounts is what the October 30 announcement coverage reports. The English-language record confirms a game, a sign-up page, and no date. If the show dates the global service, the two records converge; if it does not, December 4 remains the Chinese service's open beta, and the English-language record moves when miHoYo's English channels move. Pre-register if the launch reward matters to you, and watch November 1: it is the first point where "confirmed game, unconfirmed date" can collapse into a single answer.