The full MegaCD version of Timecop (not the existing 1 level demo) was made avaliable on a now pretty much dead site I was involved with about two years ago. I don't think many people noticed though, and unless I am mistaken, the ISO image hasn't become widely avaliable. I'd only just remembered about the game today, so I thought I would post about it on here, and perhaps you could host it too - that way theres less chance of it ever getting lost.

Anyway heres the original thread from the forum:
http://forum.sega16bit.com/index.php?topic=149.0

The original link is dead, but aypok still has it hosted on there

It can be played on emulator and a real system too, since the megacd doesn't have any copy protection  - only region code detection, which can be simply bypassed by altering the code in a hex editor.