You are Gordon Freeman. On your quest to the Lambda lab you find another one of Black Mesa’s nuclear weapon storage facilities. This one is different though; a rogue group of military has stormed the building and plans to detonate the weapon to rid earth of the alien invasion. You, becoming aware of this, must deactivate the nuclear device to save innocent scientists, and to prevent the destruction of Black Mesa’s vast amounts of data, research and information.
This review may contain spoilers
From 1999 to 2007 (The First Generation), Half-Life received some of the best mods ever created for it such as They Hunger, Half-Life:Chronicles, ETC, Solo Operations, and Half-Life:Ground Zero.
In HL:GZ, You play as Gordon Freeman who has stumbled onto a nuclear silo that the military is using to annhilate Black Mesa with. Though not timed like in 2008's smash hit Operation Nova, You still have the feel of rushing to avert disaster.
Ground Zero also has a few ideas not seen in Half-Life at the time such as Scripted trap rooms, Unexpected Ambushes, and Dead ends that can be deadly.
Ground Zero's Mapping and placement was very well put together and it feels like genuine Half-Life.