In a report from Geek.com who managed to get their hands on the game’s demo, they found out that in order to complete the game, gamers can expect to spend anywhere between 40-50 hours. Assuming that players spend a couple of hours a day, it means that they will take about a month to complete its campaign.
However for those who love to explore every nook and cranny in games, pick up every side quest, play every mini game that there is to play, it seems that you can expect to spend 80 hours or more to really complete it, which means around 2 months worth of solid gaming. All of this sounds great, especially if you enjoy the story.
That being said, there is still a bit of waiting left to do because Kingdom Hearts 3 is only scheduled for a release on the 29th of January, 2019. However given how long players have been waiting, what’s another half year, right?