As Green Line Extension maps across MBTA remain out of date, some people draw updates on with marker By Sonel Cutler Globe Correspondent, Updated May 5, 2023, 12:05 p.m.

While the purple map markers take you to each of the members of Team B you need to locate and their corresponding GPS locators, the green, circular markers lead you to other important story items.

White markers represent the location of a cave on the map. Explore these caves, which are filled with different items and resources, like a zipline gun, which will be important as the game progresses.