What is the 2nd most popular game series made by Sega next to sonic the hedgehog?

What is written in the newspapers every evening in bold letters in diary of Anne Frank? How do you get past apathy? What is the conclusion of The Strange Case of Dr. Jekyll and Mr Hyde? In A Christmas Carol why does Fred continue to see his uncle? Which characters met Mr. lorry at the hotel? What does Mr Collins do for a living? What was fransisco's motivation to go exploring? How did the northern writers differ from the Italian writers? What does benign calcification phleboliths noted in the pelvis mean? Do you underline novella titles? What Proper tragedies may have a main character from everyday life such as a farmer? What does forshadow mean in Romeo and Juliet? Why would you join the wave by Todd Strasser? Scout Jem and dill make a play about? What is the theme for the colomber? Is equality 7-2521 a static or dynamic character? What sam smith songs have poetic elements in it? What has the author Titie Said written? Examples of poetry written by filipino authors? Why did poppa help bud with his mission in the bud not buddy book?

What is the 2nd most popular game series made by Sega next to sonic the hedgehog?