Certain fights, the occasional puzzle, and some really lousy music are the flaws that keep Sonic 4 from besting Sonic Rush as the best game to come out of the franchise in a decade. But for every element that Sonic 4 gets badly wrong, it gets four or five others exactly right. Most importantly, it nails the fun of hitting springboards, bouncing off enemies, and defying gravity with pure speed. While hardly perfect, it's solid enough that even reviving the old "Se-ga!" before the title screen feels appropriate. After a decade of missteps, Sonic has earned it.