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Well, back to the front.
— The Soldier getting back on duty
A Tour of Duty is a collection of missions that may span multiple maps. Released in the Mann vs. Machine update they are available in the relative game mode only in Mann Up Mode.
Completing one Tour of Duty's mission will grant a player with an Operation Steel Trap Badge level 1; after first completed Tour of Duty all next completed Tour of Duty's will increase this item's level. Also completing a Tour of Duty will grant one of the Botkiller Weapons.
Available Tours of Duty
- Valve announced that they will release more Tours of Duty in the future.
- ↑ MvM FAQ