Hostility for HL2 is due for a name change, it was only ever a working title for the mod anyway. the new name is currently planned to be World At War, but as the entire point of this mod is to listen to what gamers think there is a thread on the forums where you can register your opinons: Moddb.com
at present i do not plan to change the mods Moddb profile, so it will still appear as hostility.