not played cod4 for ages so will be very rusty & don't know if these will be
in a DLC pack

http://iamfourzerotwo.com/2008/07/11/new-playlist-testing-this-weekend/

Bare-bones Team Deathmatch

No more excuses. No more blaming Martyrdom or Juggernaut for your lack of
skills and kills. Bare Bones Team Deathmatch eliminates the excuses and
takes it back to basics with standard Team Deathmatch with no perks, no kill
streak rewards. Just you, your skill, and your weapons.

Hardcore HQ

Hardcore HQ requires a lot more than just spamming the HQ position with
nades and running in guns blazing. Hardcore HQ encourages more tactical
gameplay and communication to win with increased damage, no HUD elements,
and friendly fire on.

Classic Search and Destroy

Call of Duty  2 style, with both teams starting with bombs and objectives to
defend adding an entire new layer of tactics and planning to the matches as
you have to not only blow up their objective, but stop your's from being
destroyed as well in the same match. Classic Search and Destroy returns the
rush of defending an objective while attempting to destroy theirs.

Hardcore FFA

Even faster paced Free For Alls, where every bullet counts and playing smart
is key for a solid k/d ratio. Standard Free for All rules, with Hardcore
mode enabled for extra damage, no HUD, and no health re-gen.