There's been a few efforts to get Half-Life: Alyx playable without VR and the latest is HLA-NoVR, out now and it's now possible to play it through, even on Steam Deck too.
Read the full article here: https://www.gamingonlinux.com/2023/04/half-life-alyx-fully-playable-without-vr-even-on-steam-deck
