http://hem.passagen.se/chruser99/Mantis.zip - All the RTP files are included, so everyone can play the game.
http://hem.passagen.se/chruser99/MantisNR.zip - No RTP files are included, so you will need to already have RM2K installed in order to play this version (which is obviously a smaller download, too).
NOTE: You have to copy & paste the links into your browser.
"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram