Here's a movie from one of my favourite category: "Cute girls that kicks butts". As a disclaimer, I would like to mention that the main reason I went to see this movie (and the two previous ones) is because it stars the beautiful Milla Jovovich.
In this third installment in the series, the world is pretty much taken over by the virus that turns people into zombies. Only a few survivors remains here and there, fighting to stay human. Alice (Jovovich) is by herself at first, but eventually join a group of survivors lead by Claire (Heroes' Ali Larter). The zombies are everywhere and many violent fights occurs, thinning the number of survivors at an alarming rate. The Umbrella Corporation is still around as well, trying to find a cure to the disease they created.
We discover new aspects and abilities for Alice, who seems just about invincible, while remaining super cute. The ending doesn't answers all questions and actually open the doors wide open for a sequel, which has not yet been announced, but is certainly possible.
If you enjoyed the first two RE, you will probably like Resident Evil: Extinction as well. Particularly if like watching Milla like I do...