Geek.com opines that if you liked Halo and Halo 2, you'll like Halo 3. However, they also like the Flood, which casts aspersion on their judgment:

The enemy A.I. is unrelenting, particularly The Flood. Somehow the developers were able to take one of the most terrifying arch-evil forces and make them even more numerous, gross-looking, and straight up frightening. If there’s ever a jump out of your seat moment, it is during a pitch black encounter with The Flood.

Geek.com will review multiplayer features in a later article.