Co-op 
Multiplayer EVE Online is a free-to-play sci-fi MMO available on Steam for PC and Mac that is set in a science-fiction based, persistent universe. Players take the role of spaceship pilots seeking fame, fortune, and adventure in a huge, complex, exciting, and sometimes hostile galaxy. When EVE was released in May 2003, about half of these systems were available for exploration, enabling players to more easily establish "hot spots" - centralized locations for trade, commerce and combat – based on their activities. As the population in EVE grows, more systems are made available to avoid overcrowding.
Business Model: Limited Free to Play with Premium "Omega Upgrade" subscription
Microtransactions: Yes - Premium access, cosmetics, skill point reallocation items, and the ability to learn skills past a set limit or have multiple characters.
Key Features:
Choose Your PvP Playstyle: Join up with an alliance or faction or live as a pirate, fighting only with your interests at heart.
Star Gate Exploration: Utilize the star gate network to travel to over 5000 different systems. You never know what might await you on the other side!
Ship Customization: Select your ship from hundreds of different models, each of which can be customized to your liking. Find your perfect ship to take over galaxies with!
Expansions:
EVE Online has a long history of updates and patches. Check them out here.
