A single player map pack with 10 levels of fun.
This level contains custom graphics and plenty of deathmatch starts and weapons for a taste of what's to come in "The Erroneous Decision."
A HL singleplayer map that is designed to test your skills.
This level is some sort of lounge area. Obviously, a few of those friendly little guys from xen have been teleporting in and killing everyone. Gordon is taking a break and happens to come across the mess in progress.
Single player or deathmatch with 2-5 players (5 recommended) Plain and simple, Very small, 3 floor level for DM and Single Player modes.
Single Player for Half Life
One of Gordy's alternate adventures finds him in the company of a small group of scientists and a few barneys holed up in a cement bunker deep within the bowels of Black Mesa.
mission briefing, you are gorden freeman ,but you cannot rest on your past successive missions you have a job to do,as you know your very survival depends on not only your stealth,but on your h.e.v suit which mesa reseach know that if they can stop you