I repurchased the series on this account just to say how awesome it is, this game is one of the best you will ever have the fortune of experiencing. You play as Gordon Freeman, a badass theoretical physicist who plays by nobody's rules. Gordon has just come out of cryo sleep after single-handedly escaping the clutches of the U.S military and swarms of interdimentional creatures at Black Mesa. You find that the world has come under control of the oppressive empire known as the Combine. Being the man of sheer badassery that Gordon Freeman is, he takes it upon himself to destroy the occupying force, using his signature crowbar.

One of the few FPS's that actually makes you work as a team, you cannot be a one-man army as you would in Call of Duty and it's exansions; Call of Duty 2 - Call of Duty 9001. It also has the most badass hats you will ever see in your entire life, and it's F2P now, so download it and be ready to have your self-confidence destroyed by being the only one without all 10,000,000,000 hats

Takes place in medieval Japan (Sengoku-Jidai) allowing the player to make a decent amount of choices--forge alliances, assassinate or bribe enemies, accept foreign trade and it's gunpowder techology, along with it's drawbacks, embrace christianity, keep to tradtions, and vassalize defeated enemies. A warning about multiplayer though, it's pretty competitive and difficult to win at first, as you only have starting units while everyone else is fielding hero units. Don't attempt without mastering tactics first, or be ready to be berated.
Definetly one of the best Total War games.