Well, it´s just as it sounds, man made intelligence.
In this case: Routines programmed
in x86 assembler. The routines (i.e. the Robots) must
be able to process data given
from the game engine. These data can be, for example,
position, what the robots can
see in his/her´s view scope, his health, the robots
that he/she sees health and so on.
All this data must be processed into the best move possible
at the time being. I short,
AI routines are the brains of the robots.