Quests

''Recently added in the 2.0 update on September 8th 2015, quests are bonus missions each of the classes can do. They vary from factions to sub-classes.''

Sub-classes
Titan Striker: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Titan_Striker?venotify=created

Titan Defender: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Titan_Defender

Titan Sunbreaker: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Titan_Sunbreaker?venotify=created

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Warlock Voidwalker: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Warlock_Voidwalker

Warlock Sunsinger: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Warlock_Sunsinger?

venotify=created

Warlock Stormcaller: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Warlock_Stormcaller?venotify=created

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Hunter Gunslinger: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Hunter_Gunslinger?venotify=created

Hunter Bladedancer: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Hunter_Bladedancer?venotify=created

Hunter Nightstalker: http://mgi-data-archive.wikia.com/wiki/Sub-Class_Quest:_Hunter_Nightstalker?venotify=created

Factions
(Faction quests are awarded once you reach reputation level 25 or higher)

Future War Cult: http://mgi-data-archive.wikia.com/wiki/Faction_Quest:_Future_War_Cult

Dead Orbit: http://mgi-data-archive.wikia.com/wiki/Faction_Quest:_Dead_Orbit

New Monarchy: http://mgi-data-archive.wikia.com/wiki/Faction_Quest:_New_Monarchy