With the Citadel on the verge of a catastrophic meltdown, Barney and Gordon Freeman are trying to escape City 17 when their plans take an unexpected detour.
I've already played this mod, oh no no wait i've played Hl2:EP1. This mod uses nothing but EP1 maps which got a little bit edited. So if you've played Hl2:EP1, you have played this mod too.