Also, because Sonic Team had gotten a lot of feedback from people who wanted to create their own characters in the Sonic universe, they decided to implement the Avatar system so fans could both create their own original character and go on adventures with Sonic through them.
The first half of the game was produced by Iizuka, with Shun Nakamura stepping in when the game became more defined.
The idea for Sonic Forces was to bring back a modern 3D Sonic made by Sonic Team themselves, who had not engaged in such a project for a while.
The goal was to give players the experience of a classic 3D Sonic game while also offering as much content as possible by including old fan-favorite characters and 2D gameplay experiences.
To make the game's story more serious, it was written so that 99% of the world had been conquered by Eggman.
According to Nakamura, the team tried to make a detour from Sonic's normal streak of victories by adding an element of despair, namely by having Sonic rescue a world stuck in despair from Eggman's tyranny.
In the final version of the game, players are still able to recover dropped rings.