While it's looking less and less likely that a third installment will ever see the light of day, there are still plenty of fans who will always return to 2004's Half-Life 2 and maybe even the first game in the series from the late 90s. As one of the best FPS titles in video game history, the sequel to Valve's influential maiden release still holds up to this day. Alongside this, virtual reality is becoming more popular in this modern era, so it's hardly a surprise that a team of modders have been looking to implement VR into the beloved shooter.