Hydrophobia

Aboard the 'Queen of the World', a city-sized luxury ship built by a group of corporate giants, the people on board have prospered whilst the world outside has fallen into the chaos of the 'Great Population Flood' – where population growth has exceeded food production, leaving people to suffer. To ease the suffering, a group of terrorists plan to murder the vast majority of humans – and when they attack and take over the Queen, you, as Kate Wilson, become the reluctant hero. You'll need quick reactions and the ability to adapt to escape the levels as water flows in, changing how the environment reacts.

Hydrophobia out on the Xbox Live Arcade this week

It's just a load of terrorists in a big boat floating around in the sea.