https://wccftech.com/half-life-alyx-without-vr/

Half-Life Alyx can be played without a VR headset, and mouse and keyboard controls seem to work fine as well.

Earlier today, Valve News Network founder Tyler McVicker discovered that Half-Life Alyx can be played without a VR headset thanks to some commands. He also managed to enable mouse and keyboard controls, and they seem to work decently without any major tweaking.