Every title in Guild Wars is a direct reflection of how that person plays his or her personal game. Some titles focus on Player versus 
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Environment (PvE), others focus on social orientation, and then some on Player versus Player (PvP) game play. The list of titles seems almost endless.
Guardian
There is only one way to get each of the Guardian title and that is to complete the missions for each campaign on hard mode and complete each bonus opportunity as well. Most people team up with their guild or alliance members who also need to complete the mission. Players can try and find groups in the mission town also. Make sure to complete the mission in the time allowed to gain the appropriate rank.

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Legendary Guardian
Completing each mission and bonus in the allotted time in both hard mode and normal mode is what players will need to accomplish in order to obtain the Legendary Guardian title. This means maxing out 6 different titles.
The Ultimate Guide to Guild Wars will help any player with their game. Learn everything there is to know about earning gold, solo farming, dungeon guides, character class walkthroughs, obtaining titles, and so much more. Your game and your characters are about to take a plunge into greatness! Good luck and have fun impressing your Guild Wars friends!