The largest single-class update that Team Fortress 2 has ever seen arrived today with clients all over the world automatically adding the update to Team Fortress 2 players whenever they load up Steam.

The new pack adds a whole host of new equipment maps and achievements to Valves ridiculously addictive shooter.

Included in the update are a selection of new weapons. The Wrangler replaces the pistol and will project a shield that absorbs 66 percent of incoming damage. The Gunslinger is a tool that allows engineers to erect the new combat mini-sentry guns which are much faster to produce than the regular sentry gun. It also gives the Engineer a combo attack that always inflicts critical hits on the third strike and it also provides a 25 percent maximum health bonus.

The new maps are called Thunder Mountain, Upward and Hightower and are designed to Valve's usual high standard.

By Ewan Aiton