Valve is celebrating Left 4 Dead 2's 15th birthday by making it free-to-play this weekend, alongside a massive Steam sale at the same time.

Techopedia looks back at the influence of Half-Life 2 on its 20th anniversary. Here are the five best moments from the ...

Shortly before the end of the game, the gravity gun also receives a dramatic upgrade, allowing you to attack enemies directly ...

Fox News chief national security correspondent Jennifer Griffin reports on the Pentagon releasing details on UFO sightings on ...