>>44874080The game is longer than some AAA games. Beating the main story and completing the post-game content can take around 28-30 hours.
They didn't really help themselves when IoA launched though, since the mystery gift let you level up Kubfu without needed to take the time to train it up, which would've likely added to the time alot of people would've played it. The story was very short and exploring the entire map could be done in like 2 hours. Unless you were really into Restricted Sparring, there wasn't much there. I beat IoA in a single day.