This game is incredible. Absolutely incredible.
To start off, the ds isnt what you'd think as a fps console, this puts you preconceptive thought down. This defines shooting on a portable console.
The campaign is incredible, it's built on the ace cod4 engine, but with better graphics, more and more interesting minigames and 'awards' - like achievements for the x360, little challenges to get throughout your gaming experience.
The online is brilliant addition, along with the 'war room' and other unlocks, the guns and weapons system are lifelike, and a direct comparison to it on other formats.
If you dont own a ds, buy one. You cant call yourself a fps ds owner until you've played this.
Buy it. It's your duty.