It's based on the popular mod King of thr Hill in ARMA 3 and Reforger. 3 teams compete for a single domination area which also includes a bonus hot zone that slowly moves inside the area.

Maps are vast and vehical drop offs are required, lends itself to a sandboxy style of combat.

It stands out as you have persistent progression with in-game currency to buy and build your loadouts and vehicals, it's more focussed than normal Tactical FPS games, and more fluid in gameplay, buy not as zippy as games like Battlefield and CoD

I played a few hours during the first closed beta. Something of a mix between Battlefield and Hell Let Loose IMO. More down-time (walking long distances, defending positions, lying on your back waiting for revive) than BF. More action than HLL and no enforced support roles. Though there are no in-game classes, some players still end up taking on roles such as continuously driving/flying players from the spawn to the combat area, or just hanging out in bases and upgrading them. Not sure what I think of the persistent economy.. In theory it could act as a soft balance for powerful vehicles, but it also allows a player to grind money one match, and then use it all in a different match.

It's shit.

I dont understand the hype around it, Squad already exists and does everything better.

There has to be some crazy marketing campaign and astroturfing going on, because the game is not good at all.