Mega Q*bert by Jaklub is a fan adaptation of the popular arcade title for the Sega Mega Drive/Genesis. The title has 2 modes – Mega mode with 80 new different levels to beat and an Arcade mode, which is based on NES Q*bert (which in turn is based on the original game). Both modes allow simultaneous cooperative play.

Release notes:

Version 1.2 is up. Most important changes are a bunch of fixes related to reported noise issues (should be fine during the gameplay on real machines now) and increased difficulty of Arcade mode (was too easy to play infinitely even with the second loop).

http://www.sega-16.com/forum/showthread.php?31375-Mega-Q*bert-(full-game)/page2