"Windows 2000 is a server os"??? Well, 2000 Server, yes.
But I get your drift - Win2k Pro wasn't designed as a gaming platform; more
for corporate use on a network.
However: I upgraded 98SE --> 2000 Pro on my home PC due to instability with
98 and not having a high enough spec for XP (and not wanting to touch ME
with a barge pole). And I wouldn't look back - Win2k is far more stable, a
pleasure to run.
The only downside is certain games won't run, eg DOS-based ones (which you
have to work around) and certain of those whose packaging doesn't explicity
say Windows 2000, or actually says "This program will not run on Windows
2000." These latter can't really be expected to play, although some of them
and many/most of the former either will play or can be cajoled to.
Try looking at other posts here for details on how to set your PC up to
enable Compatibility Mode properties for the games' shortcuts. And make sure
you have SP4. Beyond that, try posting specifics - such as the actual games
that won't play (I can't believe that NO games run) and what happens when
you try to run them. And do you have any other system problems? - that might
indicate something more far-reaching than being just game-related.