The Hidden: Source is a team-based mod for Half Life 2 developed by Project Lead, which is simular to Counter Strike: Source with either Subject 617 (aka The Hidden) or a member of the elite I.R.I.S . (Infinitum Research Intercept Squad)
Throwing the player into a world of fear and suspicion The Hidden provides an unparalleled game play experience. As either Subject 617 (aka The Hidden) or a member of the elite I.R.I.S . (Infinitum Research Intercept Squad) the players' must battle for survival against all the odds.
Their forums are up if you have any questions
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