The idea of developing a fighting style specifically designed to benefit a jetpack or other movement-boosting device is certainly not a new one, but it’s not something I have seen apply to the Starfinder Roleplaying Game. While this might grow to be a whole series of fighting techniques for soldiers to operative specializations, for the moment I’m just starting with a couple of combat feats.
For the following options, “jetpack” applies to any armor upgrade or technological, hybrid, or magic item that gives you a flight speed, or gives you a bonus to Athletics checks made to jump (including items that increase your land speed enough that the increased speed gives you a bonus to Athletics checks to jump). “Using” the jetpack means being able to activate it and expending any battery power, use duration, fuel, or similar consumable required to gain the flight or bonus to Athletics checks to jump. You don’t actually need to take an action to do this, it is part of whatever action is required in the Jet Justsu option.
Jet Back (Combat)
Benefit: When you are attacked by a foe you observing (see States of Awareness), as a purely defensive reaction you can use your jetpack to dodge out of the way. You can move up to half your land or fly speed, and gain a +4 circumstance bonus to your AC against that one attack, and to any Reflex save required by the attack. On your next turn, you must take a Move action to recover as your first action. If you are prevented from doing this (such as if you are stunned), you fall prone. You are also off-target until the end of your next round.
Jet Punch (Combat)
Benefit: You can use your jetpack as part of a charge. You do not take a -2 penalty to your attack roll as with a normal charge, but your penalty to AC increases by -2 (normally to -4 AC). You add half the item level of your jetpack, to a maximum of half your ranks in Piloting, to your damage on a a successful attack.
You may also want to take Jet Charge, Mobility, Sky Jockey, and Spring Attack as part of your Jet Justsu techniques.
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