Two localized versions of ōdi∙um have been released in Russia; both feature plot changes: Gorky 17 is mostly faithful to the original, with main characters identities changed to Russians instead of NATO soldiers, while Gorky 18 features major changes to character personalities, dialogs and plot - in fact, the whole script has been created from scratch. General gameflow is unchanged though.
In the first part of the game you find a Singing Mutant who keeps singing a song, "Pleasure little Treasure", which is the name of a Depeche Mode song from their "Never Let me Down Again" single.
Go to the DAT\COMMON directory that's wherever you installed the game. Grab the "Sound.dat" and "Voice.dat" files, and load'em in Winamp. You'll be able to listen to all the sounds and dialogue, but they're all squished together and out of order, so you may spoil bits of the story by doing this.