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A new update was released tonight for Team Fortress 2 that brings the game up to version 2939028. Among tonight's usual fixes and updates comes a new feature Valve calls "Collection Trade-Ups."
If you've got ten campaign-exclusive items just sitting around, we've got good news for you. Now you can trade them in for a higher-tier item! Simply click on any Gun Mettle item in your inventory and choose "Mann Co. Trade-Up" from the drop-down menu to give it a shot!

We're also shipping the Gun Mettle Cosmetic case, an exclusive community cosmetic item collection now available as a weekly random drop for folks who own a Gun Mettle Campaign Coin. Just like the weapons, all of these 16 cosmetics have a chance to contain Strange capability, and the nine hats in the collection have a chance at being Unusual.

Well, that seems fairly simple to understand. You have about a week remaining to hop on board the Gun Mettle campaign before the campaign ends. Let's take a look at tonight's full changelog now.

Changelog for Team Fortress 2 update for August 27, 2015
- Added Collection Trade-Ups!
-- Check out the blog post for more information: http://www.teamfortress.com/post.php?id=18161

- Added Map Stamps and Strange Filters for the featured maps in the Gun Mettle Campaign

- Added the Gun Mettle Cosmetic Case which contains new community cosmetic items
-- Gun Mettle Cosmetic Case can only be found by players with a campaign coin
-- Cosmetics in a collection can be listed on the Steam Community Market

- All Strange items now have a visible icon in backpack panels
- Added an option button to display paints and/or styles options for items in the Mann Co. Store preview page and the Steam Workshop item import tool
- Added the OWL 14 tournament medals
- Added a Steam Community Profile option to the player right-click context menu in the scoreboard
- Fixed a buffer overflow exploit (thanks to Didrole for this report)
- Fixed a Mann vs. Machine exploit related to purchasing upgrades while not at an upgrade station
- Fixed a Mann vs. Machine exploit related to the Medigun shield
- Fixed the Gun Mettle Coin not displaying its proper level in the Steam Community view
- Fixed the Enforcer getting a damage bonus as the Spy was disguising and not fully disguised
- Fixed the cvarlist command truncating some cvar/command descriptions
- Fixed hitting 'Enter' while in the backpack menu triggering buttons in the main menu
- Fixed invalid map names in nextlevel convar or the map cycle causing the server to fail to change level after displaying the score panel
- Fixed the Engineer losing revenge crits and picked-up weapons after using The Eureka Effect to teleport back to base
- The Dalokohs Bar can now accept Ally Healing Done strange parts
- Updated several HUD elements to include the name of the weapon's owner when a player is carrying a weapon they picked-up
- Updated the materials for the Stickybomb Launcher
- Updated Mann Co. Store prices for foreign currencies to current USD equivalents
- Updated the localization files

- PASS Time update
-- Fixed scoring in your own goal if you change teams while the jack is in flight
-- Fixed disguised and cloaked enemy Spies having a shield drawn for them in the HUD
-- Fixed players sometimes not being able to throw the jack
-- Fixed another case where players could teleport the jack with The Eureka Effect
-- Fixed The Dead Ringer making it impossible to throw the jack or deactivate the Dead Ringer
-- All global special abilities that are activated with alt-fire are now available while carrying the jack, unless you're actively aiming the jack
-- Unlocked console variables for community servers to experiment with without requiring sv_cheats
-- Fixed Scouts being able to pick up the jack while drinking
-- Fixed disguised Spies being able to carry the jack in some situations
-- Made weapon switch faster after throwing the jack
-- Fixed not getting a speed boost if you score and then get the jack after it respawns
-- Fixed a crash if mp_tournament was enabled and someone scored during pre-game
-- Improved the way blocking works
-- Fixed being able to cancel enemy taunts by hitting them with the ball
-- Fixed seeing a phantom jack in your hand if you threw the jack and couldn't switch back to your previous weapon (jars, cleavers, etc.)
-- Updated pass_warehouse
--- Fixed issue with jack getting stuck behind props
--- Fixed exploit of jack getting stuck in dropper
--- Fixed issue with unbalanced ammo and health kits
--- Moved resupply closets further from the doors
--- Added plank walkway to central warehouses on top of the containers

- Server Browser
-- Fixed the history tab of the server browser failing to record servers
-- Fixed the spectate tab of the server browser not working at all
-- Fixed the game info dialog for SourceTV master servers improperly showing the server as not responding
-- Fixed connecting to SourceTV servers via the Favorites tab in the server browser
-- Fixed SourceTV relay servers not properly registering on the server list in some situations
-- Fixed the game info dialog for SourceTV relay servers not allowing connection despite open slots
-- Fixed SourceTV relay servers appearing to have negative max players

- Maps Workshop Beta
-- Fixed map cycle files specified before the initial map load not properly tracking workshop maps
-- Fixed game servers using registered accounts via sv_setsteamaccount being unable to access workshop content
-- Fixed servers getting stuck in a loop when the nextlevel convar contains a un-loadable workshop map