To do Your first steps in Rival Species,
just follow the instructions below:

STEP 1: Make sure that Steam and Half Life 1 is installed and updated on Your Computer.

STEP 2: Download the Rival Species version
from one of the listed locations:
provided by
provided by

STEP 3: Install Rival Species.

STEP 4: If You have any questions, refer to this document:

STEP 5: Either host a game Yourself or try to find one through this link:
You can as well find any available server through Steam.

If You want to host a linux server or dont trust installer files, You can get a zipped full installation with this file:
provided by