It is required: Half-Life 2 or any episode
Half-Life 2 — game, very convenient for modifying. In five years which passed from its output, national handymen on the basis of an engine of Source let out strategy a la Halo Wars, quests about heavy everyday life of "office plankton", a cooperative multiplayer for original campaigns and even interactive cinema in the spirit of "Eternal shine of pure reason". And simple modifications "do some shooting zombies/combines / ant lions in different scenery" not to consider at all. This time modification which only replaces a postscoring got to this section. Other question, AS WELL AS on WHAT it replaces it. The author told on a microphone almost all sounds from original Half-Life 2. Water laps under cheerful "Boole-bul-bul", boxes fall with loud "Boom", police bullets whistle under an ear with a sound of "Fiu-fiu-fiu", grenades explode under thunderous "Booms!". But the prize of our sympathies, certainly, leaves to a sound "Chukh-chukh-chukh-chukh, I Triiiiiiiine", which sounds you understand when.
P.S. Despite the huge volume of operation, some sounds still remained original. We, for example, would like to listen "to Bzyn!" metal subjects, but, probably, not in this version.