Alyx makes her way through Antlion-infested tunnels and emerges just as the Vortigaunts destroy the last power station keeping the Vault afloat. However, the Vault is prevented from crashing down by the intervention of a tractor beam from a backup generator. While looking for a way to shut down the tractor beam, Alyx overhears a conversation between an Advisor and a Combine scientist who claims the Vault is a prison for someone who survived the Black Mesa Incident and subsequently disappeared. Alyx, Eli, and Russell conclude this must be Gordon Freeman, and that it is now imperative that they rescue him from the Vault. Alyx fights through more Antlions and Combine forces through several abandoned buildings as she heads to the Vault's dock.
