Nearly halfway through 2009, and Activision Blizzard has scored its first Number 1 of the year.

After débuting at Number 2 last week, [PROTOTYPE] has deposed EA's The Sims 3 to claim Number 1.

Atari's - sorry, Sony's - Ghostbusters lands at Number 4, having only released on the PS3 and PS2. That's a better start than inFamous, which hit at Number 5 four weeks ago.

The only other new release this week is 505 Games' ArmA II at Number 19.

(2) - 1 - [PROTOTYPE] - Activision
(1) - 2 - The Sims 3 - EA Games
(4) - 3 - Wii Fit - Nintendo
(NE) - 4 - Ghostbusters: The Video Game - SCEE
(7) - 5 - Call Of Duty: World At War - Activision
(3) - 6 - Red Faction: Guerrilla - THQ
(5) - 7 - UFC 2009: Undisputed - THQ
(6) - 8 - EA Sports Active - EA Sports
(11) - 9 - Virtua Tennis 2009 - SEGA
(13) - 10 - Grand Slam Tennis - EA Sports