Guns of Icarus Online is a team-based multiplayer online airship combat game set in a steampunk/dieselpunk-inspired, post-apocalyptic world where lighter-than-air flight is the only means to cross the scarred wilderness that divides scattered pockets of civilization. Captain or serve as crew aboard an airship with your friends and fly into battle to win wealth and glory. With a good ship and the right crew, you can dominate the skies!
Guns of Icarus is easily the best cooperative vehicle-based FPS out there! Engineers, gunners and pilots all have very different jobs to do, and teamwork and communication are absolutely necessary to win matches. There are plenty of different ships, weapon loadouts, maps and match types, so every game is interesting and different.
The developers are active and committed to improving the game and adding content on a regular basis. I won't play most FPS games online, because the communities are awful and I don't like the "random swarm of idiots" feel you get from joining pickup games. GoI is totally different and tons of fun. If small-squad teamwork (and airships!) sound like your thing, you owe it to yourself to give Guns a try.