Half-Life 2

Half-Life 2 was developed by Valve Software and was released on November 16, 2004 for the Windows following a 5-year development cycle. The game gained almost unanimous praise and acclaim for its story, fluidity and the gameplay in general. The game was bundled with Counter-Strike: Source, a remake of a critically-acclaimed total-conversion mod for the original Half-Life. Half-Life 2: Deathmatch was later released via Steam and was free to download for all owners of Half-Life 2.

You are Dr. Gordon Freeman, theoretical physicist and one of the only survivors of the Black Mesa incident. Finding yourself on a train to who-knows-where, you are plunged into a world oppressed by an alien empire, a world fraught with dangers that you, a mere scientist, will have to overcome.