Heroes in the Sky

[Morreion]

Heroes in the Sky (official site)

Heroes in the Sky (Ten Ton Hammer)

"Heroes in the Sky is a free-to-play MMOTPS (Massively Multiplayer Online Third Person Shooter) World War II flight combat simulator. Combining fast-paced PvE with PvP, Heroes in the Sky chronicles the events from the beginning to the end of World War II. Heroes in the Sky allows up to 16 players to dogfight in the skies above to claim superiority. They can even bomb cities, sink ships, and shoot down blimps and other fighters using a number of popular World War II aircraft."

GAMESCAMPUS REVEALS THE AIRCRAFT LINE-UP FOR WWII FLIGHT COMBAT SIMULATOR, HEROES IN THE SKY (Warcry)

"This line-up of WWII aircraft features an unsurpassed level of historical accuracy right down to the nuts and bolts of the planes," said David Chang, EVP of Marketing and Business Development for GamesCampus. "We took full advantage of both history and all of the technological power to create a compelling and exhilarating trip through the war-torn skies of WWII."

Heroes In the Sky Officially Launches (MMORPG.com)

Heroes in the Sky – Review (XMMORPG)

"As you first begin to play the game, you’re put in a very basic World War I style bi-plane for your first few missions as you get a hang of the game. After a few good missions, you’ll have enough to purchase your first upgraded plane. That’s when you’ll realize that, while the game is simple, the amount of planes, guns, secondary weapons, armor and others is vast and deep, riddled with options depending on how you want to play. From fast and agile fighters to lumbering giant 4 propeller bombers to torpedo planes, if you’ve got a favorite plane of World War II, you will definitely find it in this free mmo game."

[Regolyth]

I wouldn't call a game that only allows sixteen players at a time an MMO. Perhaps they forgot what the first letter of the acronym stands for, "massively." This is more of a WWII plane shooter with a multiplayer feature.