Skip to content
Gensou no Idea: Oratorio Phantasm Historia cover art

Mobile game · 2014

Gensou no Idea: Oratorio Phantasm Historia

Seven years ago during the great disaster Naglfar Night, a shift in the Earth’s crust caused the land to be inundated by the sea, washing away the soil and drastically altering the world. A great tear in the crust known as the ‘parallel out’ emitted noxious gases which hardened the skin of humans, causing them to crumble into dust. This spelled the end of tens of thousands of people. Those that were not affected moved away from the capital, which was ravaged by the disaster, to rebuild. After some time, they created a cure known as AS9 for those who were affected by the noxious gases. This allowed people to move back to the capital. Yuuma is one of those who now live within in the capital, while Akashi is a mysterious boy who lived in an area abandoned after the disaster. Their fated meeting would bring forth many unfortunate events.

Estimated daily players

~9500.0% no change vs one week ago

Range 607.5K

Estimated total players

~19,0000.0% no change vs one week ago

Range 6K50K

See what's trending

Estimates, not counts — nobody publishes real player numbers for mobile games, so these are modelled from public signals. How we work them out

Nov 14, 2014AndroidiOSESRB RPPEGI AOUSK 16CLASS IND 16ACB MA15+

Player estimates

Nobody publishes how many people play Gensou no Idea: Oratorio Phantasm Historia, so these figures are modelled from the public counts on Google Play. Each count stands in a roughly known ratio to a population — one Play rating per ~45 players, one Steam review per ~35 owners — and the estimates below combine those readings, weighted by how much each source can be trusted to speak for the whole game. Read the range as the answer and the headline as its middle.

Estimated daily players

~950

0.0% no change vs one week ago

Range 607.5K

No source reports a live count for this game, so this is a share of the total player base — a genre assumption rather than an observation, which is why the range is wide.

Estimated total players

~19,000

0.0% no change vs one week ago

Range 6K50K

Everyone who has ever played, from the cumulative counts: store ratings and installs, Steam reviews, members and subscribers.

Average estimated players per month

Mean estimated total players for Gensou no Idea: Oratorio Phantasm Historia per calendar month, newest first
MonthEstimated total playersChange
August 2026~19,000

Community activity

Last checked Aug 9, 2026

Store signals

How many people have rated, reviewed or installed Gensou no Idea: Oratorio Phantasm Historia where it is sold.

Google Play ratings

Installs
10K+

Nothing recorded from Google Play for this game yet.

Ratings left on the Android listing. It is the broadest signal in the catalogue — about half of all games here have a Play page.

Not tracked for Gensou no Idea: Oratorio Phantasm Historia: App Store, Steam, Discord, Reddit, YouTube, Twitch. A platform appears here once the game has a link to it — most mobile games have no Steam port or subreddit, so a gap is normal rather than a sign the game is small.

Trailer

Trailer

Screenshots

Frequently asked questions

How many people play Gensou no Idea: Oratorio Phantasm Historia?

We estimate that about 19,000 people have played Gensou no Idea: Oratorio Phantasm Historia — plausibly between 6K and 50K. Around 950 of them play on a given day, in a range of 60 and 7.5K. Both figures are modelled from public counts on Google Play rather than published by the developer, so read them as a scale rather than as a headcount.

Is Gensou no Idea: Oratorio Phantasm Historia still active?

Yes. Gensou no Idea: Oratorio Phantasm Historia is holding steady — it measured within a percent of where it was a week ago. We recheck every source daily, and the charts on this page show each platform's readings over time.

How are the Gensou no Idea: Oratorio Phantasm Historia player estimates worked out?

Nobody publishes player counts for mobile games, so we infer them. Each public count we can read is converted into a population using a documented ratio — roughly one Google Play rating per 45 people who played, one Steam review per 35 owners, one Discord member per 40 players — and the live counts (Steam concurrents, members online, Twitch viewers) are converted the same way into a daily figure. Those separate estimates are then averaged in proportion to how much each source can be trusted, which is why sources that disagree widen the published range instead of cancelling out. This page is built on 1 readings taken since August 9, 2026.

When was Gensou no Idea: Oratorio Phantasm Historia released?

Gensou no Idea: Oratorio Phantasm Historia was released on November 14, 2014 for Android and iOS.

What platforms is Gensou no Idea: Oratorio Phantasm Historia available on?

Gensou no Idea: Oratorio Phantasm Historia is available on Android and iOS. You can get it from Google Play and App Store (iPhone).

Share Gensou no Idea: Oratorio Phantasm Historia

Other mobile games from 3rdEye and Moe App.