Blue Shift is a very enjoyable game that can definitely be recommended to Half Life fans.

User Rating: 8.4 | Half-Life: Blue Shift PC
When reading the reviews for Blue Shift on this site it would be easy to go with the crowd and Gamespot by saying that this game doesn't add anything to the HL universe and is not worth playing. I disagree. I don't know why everyone has a problem with this game. I thought that the gameplay was the same as HL and Opposing Force; the only real drawback is that Blue Shift is so short. But overall, I liked this game. There aren't any major new weapons or anything like that, but you still get to run around Black Mesa from a new perspective, and the action is still intense. If you like Half LIfe, definitely give Blue Shift a try.