Well, I can do a crunch post right now, and a fluff post afterward.
The main system mechanic is based on opposed 3d6 attack and evasion rolls, and damage is based on the margin of success (or failure). Some weapons, like machineguns, have a very wide range, and others, like a sniper rifle, have a very narrow one.
Initiative is a resource. Initiative values are always increasing, redetermining the battle order. A high Initiative is required for some attacks, useful for others. Melee attacks consume Initiative. A high Initiative also protects you from guided missiles. Speed is life!
Character building is a sort of point buy/part selection hybrid. You select your parts, gain special traits and skills that can be used during battle, as well as points to increase stats. Advancement is through a mechanic called 'Legend Dice' and through cash payments during mercenary missions.