The Combine's Half-Life: Alyx is Valve's VR return to the Half-Life series. Playing as Alyx Vance, you are humanity's only chance for survival. It's the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Summary: Half-Life: Alyx is Valve's VR return to the Half-Life series.