Updates to Call of Duty: Black Ops have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:
Call of Duty: Black Ops- Added support for mods in preparation for the upcoming tools release. 
 
- Addressed various MP & Zombie exploits.
 
- Improved memory utilization in MP.
 
- Improved DLC filter in server browser  you can now hide any servers running content you do not own.
 
- Corrected issue which sometimes required repurchase of emblems or clan tags on weapons.
 
- Address some cases in which player could not receive Zombie invites.
 
- Replaced RPG with Grim Reaper in Gun Game Wager Match.
 
- Fine-tuned napalm and bombing-run damage indoors.
 
- Prevented rare invulnerability issue.
 
- Demolition bombs can no longer explode and be defused at the same time.
 
- Spy plane now activates in One in the Chamber in all cases.
 
- The Sprint Kills challenge for Steady Aim perk now rewards the player with the correct number of kills.
 
- Addressed a rare issue where a hacked camera spike would not function properly if the hacker also had a camera spike that was destroyed.
 
- Recording a clip with the speed mode for 2 cameras set to .1 will no longer increase in speed when switching perspectives back and forth.
 
- Improvements to Zipline functionality when viewed in Theater mode.
 
- Settings from custom games are all cleared and no longer carry over from one custom match to another.
 
- Nova gas will now affect players that are standing over their tactical insertion.
 
- Hardcore players who kill another teammate in Second Chance now lose the proper amount of points.
 Calling in a Chopper Gunner immediately after getting shot down in a Gunship will no longer end the Chopper Gunner run prematurely.
 
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