LEGO Games LOTR Battle of Helm's Deep

LEGO Games will be releasing their first Lord of the Rings game. I can't figure out how to play by looking at the picture, but it looks as though the Uruk-hai need to get through the Deeping Wall to the Hornburg (duh). Not having played any of the LEGO Games myself, I can't see any similarities between this and other games. But with at least 11 microfigures, I just might have to pick up my first one.

50011 LEGO Lord of the Rings Battle of Helm's Deep.
Ages 7+. 338 pieces. Estimated price: $39.99.
Available in August.