Starfinder Rundown

For those that played Pathfinder; Starfinder is very similar.

Skill checks roll against a static DC or opposed as normal Pathfinder.

You have BAB, Fort, Ref and Will saves as normal.

Combat is also the same: Initiative; Full Round, Move, Standard or Swift Actions.

Main Differences
There are no iterative attacks, your class and other abilities can add more attacks.

You no longer get Immediate Actions but instead get Reactions.

Most Free Actions are now Swift Actions.

If you're Flatfooted you can't take a Reaction and get -2 AC.

You no longer get a 5' step, you must take Guarded Move action to move 5' and not provoke AoO.

You no longer have AC, you have Kinetic Armor Class (KAC) vs physical attacks and Energy Armor Class (EAC) vs all energy attacks.

Their is no CMD; combat maneuvers go against your KAC+8.

You have Stamina Points, Hit Points and Resolve Points instead of just Hit Points.

You do not keep track of negative hit points, if something does more damage than you have hit points, you ignore the extra damage unless that extra damage is more than your normal hitpoints. IE you have 15 HP and take 29 damage, you drop to 0 and are dying. If you took 30 damage, that drops you to 0 and then -15 so your dead. Each Round your at 0 and not stabilized, you lose one Resolve Point. When you have no more Resolve, your dead.