Orange Box.

Later this year, another Half Life game is going to be released, and by the looks of it, it might even be better then Half Life 2 (if that is even possible. Here is a few lines from a review in Gamespot. Enjoy.

"An early scene in the episode has you (playing as Gordon) waking up in the middle of a train wreck, trapped inside one of the cars. Thankfully, your companion and ally Alyx Vance is outside and is able to free you with use of the trusty gravity gun, which is able to manipulate and throw around large, physical objects. As soon as you emerge from the wreckage, you realize that you're no longer in City 17, the setting of Half-Life 2 and Episode One. Instead, you're surrounded by wilderness and forest--specifically, the White Forest. With City 17 and its Citadel destroyed, a giant dimensional portal has begun to form over the ruins of the city. That portal links to the Combine's alien home, and if it opens, the Combine will rush reinforcements to Earth, dooming humanity. Thankfully, one of the things that Alyx stole from the Citadel in Episode One are important Combine portal codes--but to be useful they must be delivered to the scientists, led by Dr. Eli Vance and the new character, Dr. Magnusson, in their secret lab. And to do that, you've got to get through the White Forest with Combine forces in pursuit. "