DayHard is a single player modification for Half-Life 2 which places you in the shoes of Gordon Freeman's not-so-famous brother, Morgan. It's a comedy/action adventure.
If for whatever reason you need to roll back the patched gameinfo version to the mod's original (the one with the full version), just download this file right here and the appid will be changed from 215 to 220. This is mostly to have something on the website if there's ever a reason to use the mod's original file, as IF you get stuck on the final levels (rarely). For example, I thought I still had a broken mod in chapter four because the metrocops would keep shooting at me on the L'Unione building, but it was because I had killed a Combine Soldier when I got the katana after the train ride.