Re-enter the Half Life Universe and revisit City 17 in the time before Freeman, in this fan made single-player mod. The Resistance is threatened by a decisive Combine assault, and as a wanted Resistance member you will need to fight to escape from the Combine's clutch. At the same time, a mysterious force is working towards ends unknown...
This mod is absolutely superb. The level design is quite diversified and creative, to my opinion at least as good as the original hl2 and addons. The difficulty is well balanced, it's challenging, but not frustrating.