Zombi is a movie, not a country.
rile: verb, to make angry, irritate, or annoy, to vex. see http://www.merriam-webster.com/dictionary/rile
yes
no. cod 6 wont have zombies but i herd it MIGHT have alien terroists
you have to download them. on PC, i think its free. on xbox, its 800 coins, on ps3, i don't know