I don't speak english very well so I'm so sorry for any mistakes.

1. Voice chat enable
2.Guild Level
We can upgraid our guilds on next lv.
1Lv - Max. 20 members, shops (weapon,armor,helmet,etc.) have got items for 100% costs
2Lv - Max. 25 members, shops have got items for 99,5% costs
...
MaxLv - Max members 250, vendors have got items for 90% costs
(It is only example. Vaults can be other)
3.Guild Lv can be increse for "Guild Prestige" or CR+CE
Guild members are doing guild missions or playing arcade together and they are earning GP (ex. complete 1-4 depths = 10 prestige x amount of members)
4.Ad notice-board

Thanks for reading. Please comment.