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 in Mann vs. Machine official servers. Released in the relative update they are available only on servers which run Mann Up Mode; a Tour of Duty Ticket is required to participate in a Tour of Duty. Squad Surplus Vouchers can be used as well.
Depending on the tour, completing one mission will grant a player an Operation badge: starting at level 1, these badges track in their description the stat of the subsequent missions completed which belong to their Tour of Duty. Once a Tour of Duty is completed, its level increases by 1.
Also, completing a Tour of Duty will grant a player tour-specific rewards, usually in the form of Botkiller weapons: Rust and Blood are granted from Operation Oil Spill, Silver and Gold Mk.I weapons are granted from Operation Steel Trap, Silver and Gold Mk.II weapons are granted from Operation Mecha Engine and Carbonado and Diamond are granted from Operation Gear Grinder. The Blood, Gold and Diamond Botkiller weapons are less likely to drop than their counterparts. Killstreak Kits, Killstreak Kit Fabricators and Australium weapons are granted from Operation Two Cities. All weapons received are Strange quality.
Available Tours of Duty
August 15, 2012 Patch (Mann vs. Machine Update)
- [Undocumented] Added Tour of Duty Operation Steel Trap.
October 9, 2012 Patch
- [Undocumented] Added Tours of Duty Operation Oil Spill and Operation Gear Grinder.
December 20, 2012 Patch (Mecha Update)
- Added Tour of Duty Operation Mecha Engine.
November 21, 2013 Patch (Two Cities Update)
- Added Tour of Duty Operation Two Cities.
- ↑ Team Fortress 2 - Mann Up! FAQ