[Official] Team Fortress 2 engineer update in now live

Valve has finally unveiled the highly anticipated Engineer update, dubbed as the “largest single-class update ever” for Team Fortress 2. The update is now available to download on Steam. The final day of the Engineer Update unveils the Gunslinger, a mechanical stump-mounted monstrosity; “Thunder Mountain”, the most awesomely named of our Valve-created Payload Maps. You can find the full details regarding the update below,

Team Fortress 2 — Engineer Update
* Added The Frontier Justice.
* Added The Wrangler.
* Added The Gunslinger.
* Added The Southern Hospitality.
* Added 35 Engineer achievements.
* Engineers can now pickup & move their buildings.
* Added Engineer main menu music.

Engine
* Fixed client crash related flashlight usage.
* Fixed several issues related to alt-tabbing (invisible players, etc).

Added 4 new maps:
* Thunder Mountain, a 3 stage Payload map.
* Hightower, a Payload Race map.
* Upward, a Payload map.
* ColdFront, a community built Capture Point map.

Item tuning:
* The Sandvich now uses a cooldown timer, instead of the health pack recharge mechanic.
* The Gunboats now reduce self-damage by 60% (was 75%)
* The Tribalman’s Shiv bleed duration reduced to 6 second (was 8), and its damage penalty increased to 50% (was 35%).
* Added better feedback sound for Pyros on when their flamethrower is doing damage.
* Fixed blood effect on bleeding player.
* Added a glow effect to Payload carts.
* Added Romanian language support.