This game was the spiritual successor to ICON: Quest for the Ring. It was made by the same people and used their unique graphics technique. In order to get a true 16 color graphics mode with a CGA card, they used the 40-column text mode, programmed the registers to reduce the character cell height from 8 pixels to 2 pixels, set the desired foreground and background colors for each character cell, and then picked the best character pattern stored in the CGA's character generator. Using this method they kept a true 320x200 resolution. Unlike ICON, this game does use regular 4-color CGA graphics at some points.
Other companies such as Windmill Software used the same method but started with the 80 column text mode, as a result their games supported an effective resolution of 160x100. Add