Warhawk is a remake of a flight combat game of the same name; released as a launch title on the original PlayStation. The remake is multiplayer-only, with the ability to take control of planes, tanks, and jeeps. Though the game was initially to have both single-player and multiplayer modes, the single-player was scrapped because developers decided that it was vastly inferior to the game's mutiplayer component.
Now, many people were hoping that it would be released at midnight, as it was in the US store...
However, many were disappointed, and rumours sprouted up that it would be released at 5pm GMT.
However, as of 10:01 AM WarHawk is out in the European stores, I can confirm this as I am downloading now.
Just to let you know that the wait is over!
Source goes to the official website so you can find out more about the game...
