Team Fortress 2
Team Fortress 2 is personally one of my favorite current games and has been for quite some time now, It is a first-person multiplayer video game which was made by Valve back in 2007. It was one of the first of many classic team-based games that revolve around having multiple character classes (9 in total) which the player could choose from.
The game features many game modes such as King of the Hill, Capture the Flag, Payload, and many more. I've played this game for years and have grown up within the community of this amazing game, My two favorite classes are Medic & Soldier, both can be seen below.