Posts here got me to pull some boxes off the shelf and damn if I didn't find another way to feel old. You know the small-box form factor? Yeah, all of those that I have list windows 98 as an option. I would have thought those were squarely in the XP. Although if having 98 on the box rules it out as a "XP game", then you'd have to do the same for games that came out on XP and Windows 7. So some games like Mass Effect 3 have both of those listed. Same with Fallout 4.

So some I'm looking at that have 98 on the box, but I'd still consider XP are Max Payne, SW Republic Commander, Black & White, Doom 3, KOTOR II, and Beyond Good & Evil. Hell, even HL2 has 98 on the box. Of course, I think most of those were on consoles, too, so not exactly perfect for the list.