Sunfire: Intervention is a singleplayer HL:S modification. It narrates about events occured in 1990-2000s South-West Russia, Caucasus district in particular. Essentially it's two Chechen Wars and individual events happened at mid 2000s. It uses paranoia-based assets and mostly influenced by CS:CZDS.
Teaser by Fra3r.
Source mod about chechen war by Post-Goldsource Team (NOUG4AT and Fra3R)