Board Thread:Online Discussion/@comment-1453578-20131116202358/@comment-14027812-20131116202754

I think you will be able to play alone, yes, but the game was made to play with others, so expect downsides on your game play. Like ultra OP bosses, party-exclusive areas and trading system.

I wouldn't recommend it if you're playing by yourself. It's not a main game, it's a MMO.