"Numbness and rage. Fright and anger. I open my eyes. Oh, well. My cell is pitch dark anyhow. "Block E1". I heard their inhuman voices. Lying on this cold metal bed, I stretch my arms along my sides. This must be the right posture to fit in a pod. I do not tolerate the idea of not being ready. Yes, but ready for what? No, I won't give way to grief. A squeaky sound... No, no way. It can't be true. The door opens, light replaces darkness. I will ask for a reason later. Now I have a choice to take. An easy one. I will run the hell out of here, whatever it takes. It's time to get a little revenge. It's time to start my own riot act."
A single player Source mod takes lots of detail, a good storyline and lots of action. Riot Act has much of that. Set in a Combine prison, this Half Life 2 mod is sure to please it's players with plenty of action between Combine troops and Antlions. The Source 2006 engine features may be a bit primitive but Riot Act makes the best of this old engine.
The plot is a bit bare however. The only really good parts of the plot were at the beginning of the game with the great intro sequence and the character's discovery of a fellow prisoner who is really the only talking character besides a few minor characters. The mod also minorly lacks puzzles. The barrel puzzle in the middle of the game was barely challenging but tested your timing, logic and crouch jumping skills.
The game's bosses are a good way to test you. in the boss battles with the Gunship and Strider only require 1 weapon, which is the RPG. Besides these minor flaws, the game is a great Source mod and I think you should play it at least once.