Sonic the Hedgehog CD

Mission Intelligence: Sonic the Hedgehog CD is a fast-paced 2D platformer that weaponizes time travel as a core mechanic, letting players shift between past, present, and future states of each stage. Deployed on the Sega CD add-on, it showcases animated cutscenes, a CD-quality soundtrack, and the first appearance of Metal Sonic and Amy Rose. This entry experiments heavily with non-linear level design, multiple timelines, and exploration over raw speed. Keywords: classic Sonic, Sega CD, time travel platformer, Metal Sonic, retro game design.