A Very Interesting Game
The graphics, to begin with, were new and bizarre- and I never even got to play with a properly-glide enabled card, which is a bummer.
The gameplay was interesting- the enemy AI wasn't just your standard FPS idiot bad guy, and the added twist of being a little helpless baby in diapers really made you think carefully about what you were doing. One interesting aspect of the game was that the enemy humans were allowed to / could jump. so they'd jump up onto something to try and get after you. You don't see that a lot.
I usually play a game's demo to see if it is any good, and I recall playing the messiah demo waaaay too long.
I sure wish I could get it to run on a newer PC... well, along with a ton of other games from back then.