The box will be waiting for you outside the door after you put on the suit
The modification does not claim any seriousness. The modification was made in general in two day (it could have been done in 15 minutes, but some mistakes forced me to stretch the development. However, despite this, I was unable to fix some of them, for example, that after selecting the box, the v_ model may not be displayed.).
I ran the whole Half-Life with this mod with god mode enabled and places with noclip, I didn't find any critical errors.
This version can break the entire passage on c1a0c map. If you stumble upon this problem, then write to the console "give weapon_box"