Half life 2: Episode 1 is a must have for anyone who loves Half Life. It continues the story very nicely.

User Rating: 9.2 | Half-Life 2: Episode One PC
Episode 1 is the first of 3 new episodes for Half Life 2. You spend most of the game with Alyx by your side. The AI can fend for itself, so you don't have to babysit her the whole time. There are no new weapons, and few new characters, but what you have to work with does the job. After dealing with the Citadel, you spend the entire game making your way out of City 17. The developer commentary is a nice touch which helps the game with replay value. Not a whole lot is different from Half Life 2, but the graphics have been touched up a bit. It took me around 7 hours to play through the first time, and I have played through a few times since. Overall, it's a good solid game and well worth $20. I recommend it to anyone interested in FPS's who has a descent PC.