How to start the .hack series and its viewing order

Jun 29, 2016 - As the questions suggest: how do I start and what is the preferred order? It would be appreciated if one would also identify which anime/film/OVA has a main story. Additionally the timeline of which

hack//G.U. - Wikipedia

.hack//Quantum - Complete OVA Series (Blu-ray/DVD

hack//Quarantine Part 4 (PlayStation 2, 2004) for sale online

Hack Timeline] – That Dot Hacker

hack// series timeline according to MAL : r/anime

.Hack//The Movie (2012) - IMDb

Hack / / Roots: Complete Box Set : Kelly Sheridan

hack//Legend of the Twilight - Wikipedia

hack//SIGN (TV Series 2002–2003) - IMDb

Watch .hack//Roots (Subtitled) - Free TV Shows

How do i start with the Hack series? : r/DotHack