A post on the official Team Fortress 2 blog has revealed that the upcoming TF2 content update will see the Heavy class updated along with a new game mode and 7 fresh maps to play on.

The Heavy class will receive 3 new weapons to unlock with 35 achievements, to err - achieve. A brand spanking new mystery game mode will be introduced with 5 new arenas to bash around in, the "Payload" game mode will also get a new spacious map to join the tightly played Goldrush. Lastly, the community-made map "cp_steel" will be included in the Heavy update.

Shacknews is reporting Tuesday, August 19 as the (US) release date, so we can probably expect it around first thing Wednesday morning if all goes to plan.