"Quest chains" refer to a series of connected tasks or objectives that need to be completed in a specific order to achieve a bigger goal within a game or a story. Each task links to the next one, creating a chain-like structure. Full definition
Here you will find some of Destiny's most interesting quest chains. (attackofthefanboy.com)
Publisher Sega notes that off the back of player feedback, Rise of the Tomb Kings does not contain a supplementary story campaign, instead focusing on new quest chains and lore - friendly skills, traits, and gear. (pcgamer.com)
One early quest chain in Balmora has you find a Redoran councilors daughter, to then expand further into a tale of intrigue and political machinations. (wccftech.com)