Warframe is a free to play sci-fi third-person co-op action shooter. A very cinematic shooter that also has a very original look. The gameplay itself consists of as much gunplay as it does melee, allowing for a great selection of playstyles and maneuvers.
Pro You can choose your own play style
In Warframe, there are tons of weapons, both ranged and melee, that will let you fight however you like. Maybe you want to be a long-range sniper, or a massive melee beast with a huge hammer, or maybe you want to stick closer to the ninja tradition and use a sword and a bow. Whatever you prefer to play, Warframe has an option.
Pro Great selection of classes
In Warframe, you're able to play as one of the many Warframes, which are essentially character classes. You start off by choosing one of the three basic frames. Excalibur who specializes in swords and has an ability to equip an energy sword and shoot beams of energy. Volt who uses electricity to boost his damage, movement speed and attack speed. Or Mag, a frame specializing in magnetism and controlling the enemy. After that you can run missions to find plans for new ones, or purchase them with platinum (the real-money currency).
There are currently more than 30 basic Warframes and their "Prime" variants, which are superior versions of the basic frames.
Pro Great contact physics
Many online titles and MMOs feature combat with poor contact physics, so it often feels like you're not actually hitting the enemies. In Warframe, hitting an enemy with a hammer will make them fly and sliding at their legs will make them trip. This makes it feel more like a single player game than an online co-op game.
Pro You can play with a huge array of weaponry
Warframe boasts well over 50 weapons, all of which have their own unique strengths and weaknesses, which can be further improved through by empowering your weapons. You can do this simply by completing missions and collecting your loot, which can then be used to upgrade your character.