How does the Collection Completionist achievement works?

[Tsuki no Okami]

The achievement description says: "Complete each game in the collection with every character." and no matter the game was just 5 hours live some people already have it (12 hours ago when I checked it). Around 0.1% according to the statistics.
I mean, if you need to beat every single game with every single character it's impossible to complete it in such a little amount of time.

[Ignus]

Cheating.

[XboxClown89]

I believe you have to beat all the games with all characters including hidden characters and mechs included.

[Flare64]

You can make the process super easy by setting it all to the easiest difficulty and 1 fight per match.

[RogueCheepSheep]

Happens in every game, pretty sure it's due to developer testing the gold build and making sure it achievements works on release, but they can't clear that achievement out of the database XD

[Ignus]

Originally posted by RogueCheepSheep:

Happens in every game, pretty sure it's due to developer testing the gold build and making sure it achievements works on release, but they can't clear that achievement out of the database XD

That makes more sense.
There is not enough people playing these games, to have cheaters among them who care about the achievements.

[Tsuki no Okami]

Originally posted by G-Birkin89:

I believe you have to beat all the games with all characters including hidden characters and mechs included.

Oof! That's a challenge. But considering I love the Darkstalkers series and Pocket Fighters I don't mind. Red Earth, Cyberbots and HyperSF2 are cool games so no problem at all.

Originally posted by Flare64:

You can make the process super easy by setting it all to the easiest difficulty and 1 fight per match.

I was thinking about the same thing. Thanks for the suggestion.

Originally posted by RogueCheepSheep:

Happens in every game, pretty sure it's due to developer testing the gold build and making sure it achievements works on release, but they can't clear that achievement out of the database XD

This sounds totally logic and the answer to this mystery. Thanks for your answer.