How will co-op work if one person plays aerial combat and the other plays a ground unit? Will it be possible?

Yes, it is possible and works just fine in our internal and multiplayer testing. Since the game is an open world game, playing co-op versus means that you and and your partners had better be on the same page because if you’re not - for example you’re on a ground assault and one of your pals decides to go joy riding - you’re all going to get killed. 

Anything - and everything - is possible in the game. The same goes for co-op versus mode. You and three of your friends are placed in a variety of situations that you have to get out of in order to survive the scenario. If you guys are not in synch, you’re all going to die. Quickly.

 Will there be LAN multiplayer available?

Yes, yes of course. I can’t imagine any PC game that supports multiplayer not having LAN based multiplayer. The game supports up to 32 players on a LAN. And up to 64 on official ranked servers on the Internet.

How many game modes are expected to be in the game?

Single player has a single story mode campaign with sixteen missions as well as ten Instant Action scenarios which are quick engagements.

Multiplayer has five unique gameplay modes, ranging from standard team deathmatch to our co-op versus mode.