Complex sentence: Two tracks from "Knuckles' Chaotix", "Tube Panic" and "Door Into Summer", appear in "Sonic Generations" (2011), and the "Hyper Ring" power-up re-appeared in "Sonic Mania" (2017).
Split into simpler sentences: Two tracks from "Knuckles' Chaotix", "Tube Panic" and "Door Into Summer", appear in "Sonic Generations" (2011). The "Hyper Ring" power-up re-appeared in "Sonic Mania" (2017).