Recs.
Updated
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 is fast and consists of gunplay and melee brawls, allowing for a great selection of playstyles and maneuvers.
SpecsUpdate
Pros
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.
Cons
Con Can get repetitive easily
At the very core, Warframe is a game that needs a lot of grinding. You'll always be grinding for new blueprints, relics, materials, credits or just leveling your existing equipment. After a while some of the mission types such as defense (where you fend of waves of enemies), will get really boring. Then it turns out the blueprint or relic is really rare and you'll probably have to repeat that mission about a hundred more times. Coupled with the fact that there's no real progression outside the Mastery Rank, some players may quickly lose interest.