Steam Transport

The Steam Transport comes with PurrNet by default, but requires at a minimum the Steamworks.Net package in order to work.

Read the comprehensive guide by Judsin here.

Parameters

• Server Port - The port to connect through
• Dedicated server - Whether you're connecting as/to a Steam Game Server
• Peer To Peer - Whether you want clients connecting directly using P2P
• Address - The address to connect to. In case of P2P, this is the CSteamID

Steam isn't networking!

It's highly important that devs understand that networking isn't Steam and Steam isn't networking. A Steam "Lobby" isn't network related either. Purely a way for Steam users to share meta data through Steam (usernames, Steam ID, chat, etc.)