1. Subscribe to all 3 Half Life Alyx SteamVR packs in Steam workshop

Steam Workshop :: Half-Life: Alyx - City 17 Alleyway

Steam Workshop :: Half-Life: Alyx - Russell's Lab

Steam Workshop :: Asset Pack - Half-Life: Alyx

2. Download GCFScape

GCFScape

3. Open the VPK Files with GCFScape and extract them

Half-Life: Alyx - City 17 Alleyway is located in

C:\\Program Files (x86)\\Steam\\steamapps\\workshop\\content\\250820\\2006662466