Recs.
Updated
Classical first person shooter arena style game.
Movement is one of the definitive features of this game. Ever heard of "rocket jump", "strafe jump" and "bunny hopping"? It's all from here, giving you immense freedom of creative movement.
You get various game modes at your disposal, as well as the brilliant duel mode.
The game is still played on world-wide competitive tournaments and leagues, it's a cyber-sport discipline since 1999. Only its amazing quality made it possible for it to live and entertain that long.
But the most unique feature of this game is its ability to telegraph emotion, thoughts and even personality through gameplay. When you watch someone play, you can actually feel them, it's as if you are playing yourself. Although this game requires some skill to be able to take all its pros.