MX vs. ATV : On The Edge - Sony PSP Experience adrenaline-fueled off-road racing in this exciting game Immense free-world areas; variety of specialized races Numerous off-road vehicles; assortment of mini games Compete on 8 new tracks built specifically for the PSP Open-class ad hoc WiFi competition for up to 4 players Experience adrenaline-fueled off-road racing in this exciting game Immense free-world areas; variety of specialized races Numerous off-road vehicles; assortment of mini games Compete on 8 new tracks built specifically for the PSP Open-class ad hoc WiFi competition for up to 4 players