Which quest gives access to troy?

Anyone know which quests starts the line that gives access to troy? Does it start in mycenae or the home city?
|||Mycenae iirc|||

As long as you keep doing the Mycenae quests from Agamemnon, you should continue down the path to Troy.

|||if u make all chalenges (except repetable one) for mycenae then u got kill fortress chalenge quest, and after that u will open troy questline.