#1 Half-Life 2 and its Episodic Sequels
In Half-Life 2 and its episodic sequels, you take on the role of Gordon Freeman, a physicist who finds himself in the unenviable position of being the savior of humankind.
Along with members of the human resistance, Gordon Freeman must take the fight to the enemy—an alien race known as the Combine. Since the events of the first Half-Life, The Combine have since enslaved humanity and the first step to stopping them is by finding a way to topple one of their bases on Earth—the Citadel in City 17.
Half-Life 2 is regarded as one of the most important modern videogame franchises thanks to its revolutionary narrative and groundbreaking designs.