Ultima III for the Vic-20 (wordpress.com)
VIC 20 Ultima III is a faithful conversion of the original C-64 version. All game logic is included as-is. VIC 20 specific graphics and sound routines were created from scratch. The 16×16 pixel tile graphics from the C-64 version were carefully adapted to 8×16 resolution, flat-pixel tiles on the VIC 20.