It was all too common to have lockups in these older OSes. You would reboot and carry on.
Bob
I built a windows 98 SE gaming machine. It has an AMD Athlon XP 2700+ processor, GeForce FX 5200 AGP graphics card, 256mb ram and 60gb IDE HD.
I installed Wizards and Warriors and it runs great. Except when I try to exit the game the program locks the computer up completely.
Second issue is Dungeon Siege from CD installs and updates fine, but when I press play it just loads and then gets stuck on the last white dot and cannot be played.
Third issue DinoTycoon music will not work under the soundblaster option.
I have DirectX 9 installed, fresh windows 98 SE install no updates. Not sure what the issue is with some of these games.

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