This Mod's Half-LifeĀ² is related to the original story of the game, but from another point of view, the viewpoint of the player ... The Mod is set in a suburb of Madrid(Spain), in which an addict Half-LifeĀ² fell asleep in class and when awakened, everything has changed ...
This image is a screenshot of the map Inst_24.
Mmm... Interesting building structure :)
Realistic enough.