So looking at the rule set for harvest missions:
waves
SMALL_SCOUT dose not land dose not score any mission points (but will score the normle ufo flying points)
SMALL_SCOUT lands once score 30 mission points?
MEDIUM_SCOUT lands once scores 30 mission points?
LARGE_SCOUT dose not land dose not score any mission points
LARGE_SCOUT lands once scores 30 mission points?
HARVESTER lands twice scores 30 mission points each time?
HARVESTER lands twice scores 30 mission points each time?
BATTLESHIP lands once scores 30 mission points?
You actions have an impact on the behavior of the UFOs, at least for some of the missions, like the Alien Retaliation mission.
Is this incoded in the ruleset anywhere?
However, the type of UFO may be upgraded to make it more difficult for you to shoot down.
Is this something I need to take into account when adding new UFOs or missions?