You have two options to start chatting with us. Both options are linked; meaning that messages in Discord appear on IRC, and vice versa.
.. or, if you prefer IRC, we have that too!
Freenode Web Client: http://webchat.freenode.net/?channels=%23nwvault&uio=d4
Kiwi IRC (fallback): https://kiwiirc.com/client/chat.freenode.net/?nick=vault|?#nwvault
Best to open your client of choice in a new tab, so you don't accidentally close it when navigating the web page. You will only stay connected as long as the tab is open.
If you'd rather use your own IRC client, connect to chat.freenode.net and join #nwvault.