MobyGames is a helpful website to search for physical releases, as they include box scans. Sometimes not just of the cover but also the sides.. and top and bottoms of big boxes, where the system requirements were printed back in the day: https://www.mobygames.com/game/15564/half-life-2/cover/group...
Ty
It was in a small box, not just a DVD case. I still have mine, with Alyx Vance on the cover. I see there are big box versions on eBay, so that might have existed in some regions too.
Ironically, I don't have my Half-Life 1 Anthology box, because it was huge.
Oh. I completely forgot about that. As I remember it DVD cases was when big boxes were abandoned, but in that case there was a lot of overlap.