Worms: Open Warfare 2 review at Gamespot.

"After spending a few years trying to transition the Worms franchise into 3D, it would seem that Team 17 has come to terms with the fact that its good-humored strategy series is simply more appealing in 2D. Worms: Open Warfare 2 for the DS and PSP does little to tinker with the established formula, but what it does hold over the original Open Warfare is more content."

Full Source: Gamespot