Hello, I thought it might be interesting to share some information about Porto. Most of our game maps are really huge, but Porto is different - it's "only" 2 km long and about 700 meters wide (the area of main island is 1 square kilometer), which may seem small until you put on your tactical gear, flak vest, backpack, load yourself with ammo, grab your rifle and try to cross it. The motivation behind this rather small (small for ArmA) map is to create a compact multiplayer-friendly area which could be utilized in a multiplayer scenario as a whole. Porto can easily host middle-sized battle with plenty of manoeuvring involved, it loads fast and is not demanding on your hardware.
Porto is included in the official expansion pack ARMA: Queen's Gambit, available worldwide from the online store Sprocketidea.com and from many other retailers.