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...
One of the best mods for hl2 I've ever played. IMO it's much better then ep1 itself. Lots of puzzles, balanced gameplay and amazing oldschool boss fight.