You have to get out of the city seized by combines, for this you need to get to them at the main base and take advantage of their teleport. Good luck with that. For the game you need HL2 EP2. Unpack the archive in the folder "Maps", in the game open the console and enter "Operation_X_01"
Mapping is poor, but gameplay is awful, not interesting at all.
It's fun. It's like something from the 90s with aspects of Doom or Duke. It's not really HL2 much but is still tons of fun!
I have to admit, I had a little fun in this mod. Despite the fact that some of the maps are unfinished except the last map which brings me interest.
Overall, an okay mod.