An update has been released for Left 4 Dead.

- Fixed a potential remote code execution exploit. Reported via HackerOne.

An update to Team Fortress 2 has been released. The update will be applied automatically when you restart Team Fortress 2. The major changes include:

• Fixed an exploit related to the Flamethrower shooting long distances
  
• Fixed being able to build outside the map on Badwater
  
• Fixed being able to build through gates on some maps
  
• Updated/Added some tournament medals
  

An update to Team Fortress 2 has been released. The update will be applied automatically when you restart Team Fortress 2. The major changes include:

• Fixed an issue causing matchmaking to fail for many users due to Steam network changes
  
• Updated the localization files
  

An update to Team Fortress 2 has been released. The update will be applied automatically when you restart Team Fortress 2. The major changes include:

• Improved how vote kicks work in matchmaking to reduce potential for abuse
  
• Fixed a case where vote-kicked players could rejoin a match
  
• Added Asian BBall Cup tournament medals
  
• Updated model/materials for the Rasslabyxa Cup Helper medal
  
• Updated RETF2 Retrospective finalist medals to be paintable
  
• Updated some localization files
  

An update has been released for Left 4 Dead 2.

- Fixed a spectate command exploit that caused servers to hang.
- Fixed lobby chat messages not appearing on Linux.

An update to Team Fortress 2 has been released. The update will be applied automatically when you restart Team Fortress 2. The major changes include:

• Fixed the Exorcism effect not working for Wrangler kills
  
• Fixed a rare case where players could appear to be in a match they could neither join nor abandon
  
• Updated HUD with community fixes from CriticalFlaw
  
• Added and updated in-game medals for community/tournament events
  
• Updated the localization files
  

Custom Games API:
- Added GetDedicatedServerKeyV2 which utilizes a new approach for securing/generating the keys. Any custom game that relies on GetDedicatedServerKey to communicate with its backend will want to switch to the V2 version as soon as possible.
- To give custom game authors time to switch to the new system, GetDedicatedServerKey will remain unchanged until 3/31/2019, after which will be automatically switched to V2.
- When playing on local/unofficial servers, GetDedicatedServerV2 will return special values to make the state more clear for developers (e.g. “Invalid_NotOnDedicatedServer”).

Added some previously unavailable heroes to Ability Draft
* Beastmaster (Hawk is not draftable)
* Lone Druid
* Io
* Monkey King (Primal Spring is not draftable)
* Shadowfiend (Shadowraze Medium and Presence of the Darklord are not draftable)
* Techies (Minefield Sign is not draftable)
* Meepo (Divided We Stand is not draftable)
* Rubick (Spellsteal is not draftable)
Will-o-wisp and Tag Team are now draftable in Ability Draft

* The Rubick Arcana Bundle now includes a Voice of the Magus Cypher item that lets Arcana owners choose whether to use the Arcana voice or the original Rubick voice. This item will appear in Arcana owners’ inventories shortly.

Removed Flowing Entropy from the Treasure of the Amaranth and instead included Enduring Solitude. Including the Flowing Entropy set was an oversight - Collector's Cache sets are intended to remain exclusive.