Test Tube: Crossfire - Cold Hard Steele II
Part of "Test Tube #12 - Crossfire." The sequel to Cold Hard Steele 1, but with changes to the gameplay to better suit the aethestics it aims for. As the mod title suggests, it was also made to be comparable to the layout of Half-Life 1's Crossfire in mind.
You can get Test Tube: Crossfire as a map pack here: https://www.moddb.com/mods/map-labs/d...
It's highly recommended to have Half-Life 2 and/or Half-Life 2: Episode Two installed when trying out this map pack.