As frantic as it is beautiful, Kromaias approach to gameplay and AI revolutionises the shoot-em-up concept in a variety of ways. Giving players full 360˚ freedom while insane enemy swarms and giant guardians attack changes the traditional style of arcade shooting significantly. Also, adaptive AI creates a special kind of emergent gameplay: one that changes variables like enemy speed and formations to offer something new depending on how you play. Combine this with ultra-manoeuvrable ships and a wide range of worlds to explore, and youve got a shoot-em-up that changes the genre forever.