Sim Theme Park? I believe I used to play that one, along with its sequel SimCoaster (I think that's what it was called), it was really cool to me because you could build a theme park from a top-down view, then come down to a first person view and explore your park and ride your rides in 3D. Of course, since we are talking about 1999 here, the graphics were uglier than a Mario Party gone bad, but still, the game was good clean fun... until someone puked.