Machine Head

Machine Head is a challenge perk $$ It is given for completing the Demise of the Machines challenge.

Requirements
The Courier must kill 50 robots for one rank each time, three times.

Effects
The player character gains a bonus damage against robots (Mister Gutsy, robobrain, Protectron etc...)
 * Rank 1: +3% damage
 * Rank 2: +6% damage
 * Rank 3: +10% damage

Bugs
Although there are 3 ranks for this perk, a bug in the reward script makes it impossible to get the third rank. The same bug also causes the notification to misreport the rank that is given. When rank 1 is given, the notification says that you've been given rank 2, and when rank 2 is given, the notification says that you've been given rank 3.