Players can unlock additional museum content, such as music arrangements from later games, concept art, and cutscene animatics, by completing in-game achievements or spending coins earned through gameplay. Coins can also be spent on additional attempts in Special Stages.[1] Players who pre-ordered the game started with 100 coins and mirror mode unlocked. Menu aesthetics, a set of 11 harder missions, and tracks from Sonic Spinball (1993), Knuckles' Chaotix (1995) and Sonic 3D Blast (1996) for the museum music player are available as downloadable content (DLC).[7]