Operation Gear Grinder

Operation Gear Grinder is an Expert Mann vs. Machine operation featuring three missions on three maps. It was introduced in the October 9, 2012 Patch, together with Operation Oil Spill. Upon the completion of the first mission, the Operation Gear Grinder Badge is awarded.

Missions

Operation Gear Grinder missions
Map	Missions	Waves	Notable Robots
	Desperation (Expert)	7	N/A
Decoy
	Cataclysm (Expert)	7	N/A
Coal Town
	Mannslaughter (Expert)	5	N/A
Mannworks

Available loot

Completing one of the missions in this operation in a Tour of Duty will reward the player with a random item from the random drop pool. Upon completion of the whole operation, the player receives the regular loot upon completion of a mission, but is also guaranteed to receive a Carbonado Botkiller weapon or a rare Diamond Botkiller weapon. There is a small chance the player will also receive an Australium weapon (for a total of up to 2 loot items).

Operation Gear Grinder loot
Upon mission completion	Guaranteed loot
		Item from the random drop pool	Operation Gear Grinder Badge†
Upon tour completion	Guaranteed loot
		Carbonado Botkiller MK.I weapon‡
	Rare loot
		Diamond Botkiller Mk.I weapon‡	Australium weapons
Note	† Only upon completion of the first mission of the first tour, or upon completion of the first mission of the first tour after deleting the item. Deleting the item resets the tour count.
	‡Only one Botkiller type and weapon is awarded per completion.

Strategy

Main article: Community Mann vs. Machine strategy

• Community Decoy strategy
• Community Coal Town strategy
• Community Mannworks strategy