Sierra Entertainment

Sierra Entertainment is a american publisher and developer founded in 1979.

This company is responsible for games like Half-Life 2, Half-Life, TimeShift, Half-Life, The Operative: No One Lives Forever, Half-Life: Opposing Force, Judge Dredd: Dredd vs Death, Aliens Versus Predator 2, F.E.A.R.: First Encounter Assault Recon e Die Hard: Vendetta.