Okay, so I played the game, ages ago....

There was this stealth level...you'd get up to the
elevator, and you'd die when you used it.

You would restart the level, but this time around,
the elevator would work properly...

Is this still the case?


Also, Sin appears to be gone from Steam....not the
end of the world, since it is here, now. :)

It was never possible to buy Sin 1 on steam, however, you will get it for free
if you buy SiN Episodes: Emergence.

Just remember that that version of Sin on Steam was the censored release - this is the original, uncensored one.

Even if I go to the Sin Episodes page, I don't see the Sin game,
over at Steam. How was it censored?

Okay, when I played the game, I think that I played one that I got
on eBay....

Tip : to play a CD version, you have to set it to Windows 95 mode (compatibility tab).

Here, the following page shows the differences between the original and the Steam version:
http://www.nextdimension.org/sinsteam/