The ogsm_eng_iva.zip file you have requested: Clear Sky / Mods / Singleplayer / OGSM English Instrument Variation Addon - 957.51kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
This small mod is an unofficial addon for the English translated OGSM (Old Good STALKER Mod) for STALKER: Clear Sky. All credit for the original content goes to the authors of this fantastic mod, the OGSM Team, and to Remco for his English translation. Many thanks to all of you!In OGSM, the ability to purchase and "play" guitars and harmonicas was implemented. Activating the item would play a single sound file for each instrument. The Instrument Variation Addon (IVA) adds 6 new sound files for the guitar, and 3 for the harmonica, picked randomly when the item is used.