Alternate Arm

"We were finally able to properly implement a popular suggestion for the Robo Monkey, and will be keeping an eye on it's [sic] performance more closely in this update. [...]"

- Ninja Kiwi, referring to Alternate Arm in their Version 20.0 patch notes

Alternate Arm is a targeting priority added in Version 20.0 for Bloons TD 6, exclusive to the Robo Monkey and its higher-tier upgrades. It adds a second target priority above the main target option. Both target priorities use separate target priorities. What makes the Alternate Arm targeting priority distinct from just a "secondary target priority" is the mutual exclusiveness of each arm; two arms can't have the same target priority.

Function
Alternate Arm controls the setting for the arms of the Robo Monkey, as well as for Tech Terror, and The Anti-Bloon. These targeting options don't correspond to the left/right arms, but instead correspond to the combination of dual target options. Both arms cannot use the same targeting option at once. By default, the Alternate Arm is set on Last, or First if the main targeting priority is Last.

The nomenclature for targeting priorities with Alternate Arm is written like this: the main target priority, hyphen, and Alternate Arm target priority. For example, "First-Last" and "Last-First".

Summary
Having the Alternate Arm option allows for more targeting options, providing better custom Robo targeting. The mutual exclusiveness of each arm is not very convenient if needing to hit the same target, rather it works better for maximum coverage of targets. Fortunately, neither arm is hardcoded based on the other.

Tips

 * TBA

Trivia

 * The option to add a secondary targeting for Robo Monkey was long-requested by users on r/btd6.