Mortal Kombat Arcade Edition v1.0a is likely an early release or revision of the Mortal Kombat Arcade Edition port for the Sega Genesis. The ".0a" designation usually indicates a minor revision following the initial release (v1.0), possibly fixing bugs or addressing minor issues. The game's core development is still credited to Acclaim and Midway.

Mortal Kombat Arcade Edition v1.0a

Mortal Kombat Arcade Edition Enhanced v1.6