The application itself, Lambda1VR, only acts as an engine to run Half-Life in VR on your Quest. While all of the games in the series so far are traditional games and only available to play officially on PC and Mac computers, a sideloaded Oculus Quest app allows you to play the original Half-Life game in VR with full 6DoF on your headset. Ahead of the release of Valve’s upcoming flagship VR title, Half-Life: Alyx, you might be looking to play through some of the earlier entries in the Half-Life series.