The Exodus Project creates and houses Upgrade Projects. An upgrade in this sense is a patch to the PC version of the game that is designed to improve the audio/visual quality and correct bugs or gameplay in the original.
Ultima 2 Upgrade
The Champion who slew Mondain returns home to Earth, only to find it destroyed by CGA color! Fortunately, this upgrade will correct this awful-looking destruction wrought by the evil Minax.