Thanks to Alfresco @ HUKD!
Ace Combat: Assault Horizon is a competent and visceral arcade flight sim, packing gorgeous graphics, plenty of enormous explosions and outrageous furballs that will take you right into the danger zone. As a fan of the franchise, though, I should point out that its derivative focus on providing a Call Of Duty-esque experience holds it back from the true greatness of its predecessors. Enormous dynamic battles against floating fortresses has been replaced with turret shenanigans, cutaways and (as always) an AC-130 section... but the raw brilliance of the close quarters dogfighting has to be experienced to be believed. Game's price is the cheapest around - and it's the limited edition too.
Ace Combat: Assault Horizon provides you with some really enjoyable dog fights, involving planes not the illegal underworld gambling activity, and there's a bit of variety thrown into the mix thanks to the helicopter missions. The merchants listed above are parting with limited edition copies of the game on Xbox 360 and PS3 for £19.99, which'll save you £2 on the next best offers out there. Thanks to Ferrari100 @ HUKD.