Helldivers 2

So the missions themselves are their own instance, were 1-4 people are given a set of objectives and they try to complete them then extract.

Outside the missions there are several planets controlled by various factions. The helldivers select the missions they want to do here and what planet it is on.

Once they complete a mission the success gets added to the community "score" of that planet, and once the community contributes enough missions the planet is taken (or successfully defended).

This way the community can come together and chose which planets to attack in the war.

Sometimes we are given a "major order" which is an objective to aim for in regards to what planet to attack, if theses are completed we are normally rewarded with something.

There is one major order going on at a time, and yes everyone has the ability to contribute to it. There are a lot of other personal things going on too, but the mission selection encourages contributing to the major order.

Eveyone gets the rewards for the major order if it is successful, and most of them have been. You can also see player counts by planet, you see other ships in orbit with you, and see more.if there are other players doing missions nearby, and other things that make the game feel large and connected. The actual gameplay is up to four players on a map at a time.

The jingoist propaganda style is also over the top and clearly inspired by Starship Troopers. There are a fair number of annoying bugs, but not enough to slow down me or my friends.

Somewhat. Everyone contributes to the same goal (or doesn't contribute) by playing missions. The missions themselves are 1-4 players Co-op (with intense amount of "co-op" aka friendly fire)

Yeah. You have your own goals of course, but honestly you don't really matter in the grand scheme of things. We're all working together towards major goals in this war.