Marvel’s Spider-Man: Miles Morales has a pretty short campaign, which can be completed in less than ten hours without breaking a sweat. Although many side activities can take the entire gameplay time to as much as fifteen hours, the main campaign’s length might disappoint many fans out there.
Thankfully, Spider-Man: Miles Morales has a New Game Plus mode that allows players to replay the entire game all over again; however, they will carry over all their progression, skills, and gadgets in the playthrough. Basically, whatever you have unlocked stays with you in the next playthrough; however, the open-world activities get reset.
To start New Game Plus mode, you need to go to the Main Menu and press the Cross button to see your Save slots. In the save slot where you have finished the game, a Plus icon will appear, and you need to highlight that save slot and hold Square. You will see a creating NG+ notification, and this might take a while.
Once you have done this, a completely new save file will be created, and it will be marked as NG+. Your previous save file will still be intact; however, all your progression will be carried over to the new save file as well. Simply use the new NG+ save file to play the game in NG+ mode.