You need to have steam running. Use a fake account. You can create an account here: https://store.steampowered.com/join/

run Launcher.exe

to connect to the server, press F1 and use the command:

client.connect rust-exp.alkad.org:28015 - Alkad client.connect rust-exp.alkad.org:28019 - Alkad 2 client.connect spb-1.alkad.org:2021 - Alkad 3 client.connect rust-exp.alkad.org:22222 - Hardcore Survive client.connect rust-exp.alkad.org:6666 - SkullServer client.connect survival-instinct.ru:29015 client.connect spb-2.alkad.org:2231 - PvE

Alkad
https://forum.alkad.org/
https://expshop.alkad.org/