is there any possibilities to play delteria in pc like fb client or something?  

Via our Beta Discord, this is what we recommend you do to play on PC, though Delteria currently is also accessible through Facebook:

Spoiler

In order to install the PC Client, you will need to create an account on GraalOnline.com.
(In order to reduce issues w/ your account on iServers please make sure you use an email that is NOT associated with iServer accounts)

You can do this by going to:
https://graalonline.com/accounts/signup

Once you've created your account please go to:
https://graalonline.com/downloads/

Then download the GraalOnline Client
Please make sure you download and install the correct client for your OS system.

Once you've installed the client and opened the Client, you'll be sent to a login screen.
Input your account information and hit "Start" and you'll be brought to a Login Server that displays Servers.
Look for "Delteria" under the Playerworlds Column and Double Click on it to Connect (Or click on Delteria then click on Connect)
- If you do not see any servers type in "Delteria" in the servername textbox at the bottom-left and hit enter and it will connect you to Delteria.

I hope this helps.  

ty see you in delteria