The PC version of Call of Duty: Black Ops has just received a new patch, with updates to the game in preparation for the upcoming release of mod tools.

The patch also addresses "various MP & Zombie exploits," an "improved DLC filter" for the multiplayer server browser, and tuning various elements such as the damage dealt by napalm and bombing-runs while indoors.

Black Ops will automatically update when the Steam client is restarted.

Call of Duty: Black Ops "Patch Notes" - May 27, 2011

• 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.