According to the update webpage, Badwater Basin focuses on more open spaces and features less chokepoints than previous Payload map Gold Rush, which came as part of the Medic update earlier this year.

Badwater Basin will arrive as part of the largest Team Fortress 2 PC update yet, set to debut next Tuesday with a new gametype, seven maps, and three weapons for the Heavy class. The first new Heavy weapon, the Killing Gloves of Boxing or K.G.B., was unveiled yesterday alongside a set of 35 class-specific achievements.