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 even the emotions of both friends and enemies.
The player again picks up the crowbar of research scientist Gordon Freeman, who finds himself on an alien-infested Earth being picked to the bone, its resources depleted, its populace dwindling. Freeman is thrust into the unenviable role of rescuing the world from the wrong he unleashed back at Black Mesa. And a lot of people he cares about are counting on him.
Half-Life 2: Episode One is the first in a series of new adventures created by Valve that extends the Half-Life 2 single player experience.
Stepping into the hazard suit of Dr. Gordon Freeman, you face the immediate repercussions of your actions in City 17 and the Citadel. Rejoin Alyx Vance and her robot, Dog, to once again aid the human resistance in their desperate battle against the totalitarian alien menace of the Combine. Episode One exposes Alyx's combat skills and knowledge of City 17 as the player battles side-by-side with her in this 4-6 hour adventure of greater density and detail than non-episodic releases
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.
As Dr. Gordon Freeman, you were last seen exiting City 17 with Alyx Vance as the Citadel erupted amidst a storm of unknown proportions. In Episode Two, you must battle and race against Combine forces as you traverse the White Forest to deliver a crucial information packet stolen from the Citadel to an enclave of fellow resistance scientists. Episode Two extends the award-winning Half-Life gameplay with unique weapons, vehicles, and newly-spawned creatures.