Call of Duty 4 is the newest game in the Call of Duty series and it really rocks! When playing in multi-player, you have loads of extra’s, challenges, perks and weapons to unlock.
I gathered some information about these things, just to make a clear list of stuff that is unlockable. I hope you will find this information useful. Also, because the post was getting really long, I splitted the info onto multiple pages, to make it easier to read.
Page 1: Main page
Page 2: Ranks and unlockables
Page 3: Weapon Challenges
Page 4: Bootcamp Challenges
Page 5: Operations Challenges
Page 6: Killer Challenges
Page 7: Humiliation Challenges
Page 8: Elite Challenges
Page 9: Golden Guns
Page 10: Multiplayer Maps (New!)
Edit: I editted the pages so they would include the Elite Challenges… dumb ass thing was that I had them all along, posted under the Humiliation Challenges.
Edit (July 3rd 2008) So, today I finally had time to update the Call of Duty lists.
I added a new page, showing the maps in multiplayer. You can go to that page, by clicking here or by just clicking the banner on top of this page and click page 10.