What are some of the greatest trilogies, Star Wars, Lord of the Rings, and of course, Classic Sonic (Unless you count Knuckes as 4, rather than just the second half of Sonic 3). All three games were fantastic and the third instalment was a blast to play and argueably influenced the series more than any other Genesis games with the introduction of Knuckles, the Master Emerald, and the more Cinematic levels. By Aamypink from DeviantArt.