it's primarily a shooter, but quite complex.
instead of skills the game has perks, and some perks are required for others or have level requirements. perks are divided into five categories that roughly equate to combat stuff, auxiliary, technical, rogue/social, outdoor. each category has seven perks, some depend on perks from other categories.
most perks only give passive boni, but a few enable you to do more stuff, like using heavy weapons.
inventory has slots and a weight limit, the latter can be raised through a few perks. the weight limit is rather low, so no carrying around tons of stuff.
there are only three equipment slots (weapon, armor, ammo type).
weapons have durability, different ammo types, some are fairly exotic (like an insect which acts as a knife), and they can be modded, which seems to have a chance of failing as there is a perk which increases the chance of success. no idea how exactly the mods work or look yet.
there are vehicles, you can steal them, and they also have storage space.
healing items have an addiction rating, and there are three different addiction bars the game tracks (drugs, meds, alc).
there seem to be at least 7 factions (empire, republic (lol), free traders, bandits, civilians, clatz revolutionaries, nest clatz). looks like there is only one kind of negative rep: hostile, but a proper progression for positive rep.
the game has stealth, but it's kinda weird. instead of crouching and just staying out of sight, which will still get you noticed rather fast, you have to enable a separate stealth mode, which will color the edges of the screen and slow down your movement speed considerably. in stealth mode you see enemies within a certain range on the radar, regardless of whether you see them or not, and if you do something to increase their awareness, they will also display sight cones. it's sorta stupid, no idea if it gets better later on.
the starting map is in no way representative of the game, as i just found out. the first real map is pretty friggin big, and if you wait for a bit instead of doing what you are supposed to, you get to steal a small ship and dick around the map. will post some more later.