In an interview with IGN, Sonic Frontiers Director Morio Kishimoto talked about the game’s length and difficulty curve.
In terms of length, Kishimoto confirmed that the game would be around 20-30 hours, with full competition taking roughly double the time. Kishimoto stated that the game’s length was part of the reason they decided to make Sonic upgradeable throughout the adventure, in order to keep players invested.
Kishimoto also talked about the differences in the difficulty curve between Frontiers and past Sonic games. Specifically, Kishimoto mentioned how Sonic games typically become more difficult as they progress, and how such a curve was no longer necessary with Frontiers:
“In previous Sonic titles, we had to gradually make the stages more difficult in order to reach an amount of play time that would satisfy players. It is natural for level-based platformers to become more difficult as you progress. However, for Sonic games the problem has always been that higher difficulty can get in the way of the game’s sense of speed. In Sonic Frontiers, the Open Zone offers a lot of content already, so raising the difficulty in order to increase the play time was no longer necessary. From start to finish, we were able to maintain a sense of speed with ideal level design for a Sonic game.”
For the full interview, check out the source below.