SoundNodeWave extension that might contain the sounds you're after. The OGG (open source format) sound files are stored in the UPK files located in \XCom-Enemy-Unknown\XComGame\CookedPCConsole\, so look for a UPK filename with the. 5.1.12 Doing it Again (Cause you got it wrong the first time).5.1.11 Adding the new voice to the Game.5.1.9 Configuring the new package in the UDK.5.1.7 Setting up the Voice Package Archetype.5.1.6 Map the Sound Cues to the Archetypes.