Rock Paper Shotgun
Valve considered making a new VR game for the Steam Frame, before tackling the "ludicrous" task of getting Half-Life: Alyx running standalone

Summary
Valve have sometimes – if perhaps not often enough to call it a grand old tradition – massaged interest in their hardware by pairing the kit with a new game. For the Steam Deck it was Aperture Desk Job , and for 2019’s jammy sod of a VR headset, the Valve Index , it was Half-Life: Alyx , a full-length City 17 adventure that reviewer Graham (RPS in peace)…
Steam