Reply 20 of 68, by Kerr Avon
Half-Life is a great game, and also has many fantastic free addons made by fans (such as USS Darkstar, the They Hunger trilogy, Azure Sheep, etc, from www.moddb.com), and you really should play the fantastic first official addon, Opposing Force. The other official addon, Blue Shift, isn't much good at all, being very short, addng nothing of interest, and being just all-round disappointing. Azure Sheep is actually based on almost the same premise as Blue Shift, but is a thousand times better, and is free.