"Sega Mega Mouse patch for “Dune - The Battle For Arrakis” on the Sega Genesis. You need a pad in port one, and a Mega Mouse in port 2. The pad is used as normal to start a game, then the main game screen is controlled by the mouse.
This patch is a fix of the original patch by Ti. You can read about this at SpritesMind in the thread here: https://gendev.spritesmind.net/forum/viewtopic.php?f=23&t=2126&p=33975&hilit=arrakis#p33975"