I got The Secret Files and The Christmas Chronicles. As far as I remember, those are expansion packs. So where's the base game? I launched TSF and under them are what I remember to be the base game episodes. But I can't play them, they're grayed out. What gives?

Nevermind, figured it out.

What was your fix? I am interested.

so what should i install? just bought it.

Jazz Jackrabbit 2 - The Secret Files is the base game + extra episode.

Jazz Jackrabbit 2 - The Christmas Cronicles is an updated version of Holiday Hare 98.