What an incredible game. The fact that it celebrates the franchise's 20th anniversary by reusing classic stages, music, characters and scenes makes the game even more special. I had fun from start to finish. Guaranteed nostalgia. The stages are well detailed in terms of visuals and exploration. I wish it was longer, even though there are missions for that. Another factor that enchanted me was the collectibles: music, concept art, game cutscenes, character facts and trophies. They encourage you to complete all the challenges and talk to each of Sonic's friends! It's worth completing 100%. A gem of the franchise.