Tonight Team Fortress 2 received an update targeting the Engineer class. It adds new weapons, Achievements, and maps.

As you earn the new Achievements, you'll unlock the three weapons that replace the Engineer's normal armaments. Frontier Justice is a shotgun that awards you bonus crits when your sentry gun racks up kills. The Wrangler allows you to remotely control your sentry gun's fire. The Wrench's replacement is called the Gunslinger and it enables you to drop mini-sentries.

There are three new maps to putz around on, too. They're called "Upward," "Thunder Mountain," and "Hightower." Each is designed for the Payload mode.

The update will download automatically when you start up Steam.