Half-Life 2: Hidden Source Client Updater 2a1a1h

Description
If you already have version 4a of the Hidden Source client installed then this file is used to update it the latest version of 4b.

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Hidden Source places the player into adrenaline fueled, tension filled scenarios from high tech labs through abandoned train depots to murky, cold sewer systems. Playing either as part of an eight man Infinitum Research Intercept Squad (I.R.I.S.) or as Subject 617 AKA "The Hidden". As a member of IRIS the player must locate and destroy the Hidden, as the Hidden the player must evade capture and use all abilities at his disposal to turn the tables on his aggressors.