of people, hence her desperation to destroy it. She urges him to escape as she recharges the satellite's laser, as the Combine have become aware of her location and she fears retribution. With the aid of Minerva and a stolen helicopter, the protagonist fights to the surface and escapes the island just as it is annihilated by a second orbital blast. Minerva's communications are unusual in that each is prefixed by a time/date stamp in International Date Format (ISO 8601), giving an explicit timescale to the plot. These timestamps extend to several written pieces on the series' website that give background to the story. From these and the in-game messages it is possible to construct a partial timeline of events covered in the Minerva series. Episode events Metastasis Metastasis is the first chapter in the Minerva series. It is divided into four episodes: Carcinogenesis, Downhill Struggle, Depth Charge, and Pegasus. Episodes 3 and 4 were released on October 1, 2007, which completed the first chapter. Carcinogenesis Metastasis 1 begins with the player being deposited on the shore of a mysterious island by a Combine helicopter. Under attack from the outset, the player must fight a path around the island to gain access to its center, guided on occasion by messages from Minerva. Combat and exploration dominate gameplay in this first installment. Dropped in the water next to a wharf, the player must survive an initial firefight with Combine forces before getting his bearings. The wharf with its collection of buildings is fenced off; the island's most obvious non-natural feature is a shimmering stream of plasma descending from the cloud cover straight into the island's center. A circuitous tour of the island ensues, involving multiple variegated enemy engagements (at a distance, up close, elevated, bunkered, flanked), all set in a convincing and detailed rocky beach environment. The outdoor tour ends at the wharf next to which the player is first deposited, the first of many such circles throughout the Minerva series. Underground exploration with minimal combat follows, heightening tension and raising questions about what the Combine are doing on the island, the apparent aim of Minerva's "scientific investigation." A return to the surface yields more combat, access to the plasma stream's entry point, and the beginning of the descent down the beam's path that carries the episode to its conclusion and is continued in the next installment. We learn little about