Most of your time in Echoes of Aincrad will be spent progressing the main story, though you can also take some time to tackle side quests you discover via clues or pick up from NPCs in towns. And you'll actually want to pursue these because a few specific quests can unlock some important things, one of which is this game's version of gear transmog.
English
Arabic
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek