I have a key for Cognition episode 1 and another key for Cognition episode 2. Since the episodes have since been combined into just the single base game, I think these will each unlock the game itself. I think they may also unlock volume 1 of the soundtrack. Please allow me to delete the giveaway if the keys don't activate the game correctly. If a key says it's already used, please let me know and I will provide a replacement key.