Hunt Down The Freeman
Hunt Down The Freeman is a Source game sold on Steam, for actual money.
It is notorious for being poorly developed and poorly put together. Shortly after release, the original developer abandoned the game due to negative reviews & dissolved.
A group of developers have attempted to revitalize the game through numerous changes and porting the game to the Source 2013 Multiplayer branch. This was originally known as the M3SA beta, and is now known as Operation Whiskey Freedom (OWF).