The direct answer
The developer said internal tests of the full game took about 8–10 hours in a January 28, 2026 Steam reply. That is a first-party estimate from team testing, not a measured average for new players. Expect your own result to vary with exploration, failed loops, difficulty and optional goals. The research did not find a current-version statistical distribution of player times.
Developer testing versus player estimates
Deku Deals displayed 6.5 hours for Main Story, 9.5 hours for Main + Extra and 10 hours for Completionist when reviewed. These are aggregated estimates with an undisclosed sample size in the collected material, so label them 待确认 as representative player averages. They may derive from the same underlying HowLongToBeat dataset as another aggregation site; two mirrors are not two independent surveys. The developer’s 8–10 hours and the shorter “main story” number also measure different things, so averaging them would not answer the question.
Why full-game videos differ
One long-form walkthrough is about 9 hours 50 minutes and includes spoken play plus extras or achievements. Another no-commentary full-game upload runs about 3 hours 27 minutes. Editing, route familiarity, retry handling and included extras can all change a video’s duration, and the research could not reconstruct every cut. Neither runtime is a reliable first-playthrough benchmark on its own.
Prologue time is separate
The free Prologue is a separate Steam release, not the same content scope as the January 2026 full game. Two Prologue videos run roughly 36 and 51 minutes, but they are individual recordings, not a representative completion survey. Do not add either number to the full-game estimate or substitute it for the nine-chapter release. The research did not establish an official typical Prologue playtime.
What remains uncertain
There is no verified sample count for the aggregated main-story figure or separate post-1.1.2 averages by difficulty. The new difficulty introduced in 1.1.2 could change individual experiences, but the research found no measured effect. For planning purposes, the clearly attributable figure is the developer’s 8–10-hour internal test. All population-average claims beyond the listed aggregator snapshot remain 待确认.