£free / Android, iOS
This game starts off as if Asteroids had a baby with a top-down racer: your triangular craft blasts around circuits, gaining speed when its bum scrapes neon track edges. Soon you discover you’re part of an OS ruled by a deranged AI. Story and game quickly expand, as you glimpse the world beyond the screen and battle gravity in cavern-based sections that recall 8-bit classic Thrust. Rarely do mobile titles pack in so many hours of clever, thoughtful narrative. Pretty much never are such games free.