There's an "alert"/line-of-sight mechanic where you don't actually know where anyone is unless they fire at someone (general vicinity) or you actually see them on your screen/they hit you (exact location).

ETA: there's also an armor system, where different tanks have different levels of plating; and depending on the angle of the hit, it'll do more or less damage, or it might bounce off entirely.

There are light, medium, and heavy tanks, each of which have their own abilities, pros/cons, and of course armor levels. There's at least one or two sniper tanks; each different tank has a special ability too, like scanning an area to see where enemies are (it only shows a static location so it's more like a "last known" type of thing, people can move and reposition), extra armor for a few seconds, a dash boost, etc. One of the tanks literally transforms into a jet as its ability and you can fly around and shoot from the air for a limited time.