Half-Life 2 (2004): By taking the suspense, challenge and visceral charge of the original, and adding startling new realism and responsiveness, Half-Life 2 opens the door to a world where the player's presence affects everything around him, from the physical environment to the behaviors Half-Life 2: Episode One (2006): Half-Life 2: Episode One is an all-new episode created by Valve that extends the Half-Life 2 single player adventure. Half-Life 2: Episode Two (2007): Half-Life 2: Episode Two is the second in a trilogy of new games created by Valve that extends the award-winning and best-selling Half-Life adventure. More Info Developer: Valve Corporation Publisher: Valve Corporation Genre: Action (Shooter),3D,1st Person Language: EN / Multi25 Treatment: Not required Release Date: 2004-2007 System Requirements CPU: AMD/Intel 2 GHz Dual-Core RAM: 1 GB OS: Windows Vista / 7 / 8 / 8.1 / 10 Video Card: Direct X 9.0+ Capable GPU with 256 MB VRAM Free Disk Space: 10 GB