Times of Lore is an action RPG created by Chris Roberts - author of Wing Commander - and published by Origin Systems. It was released for Commodore 64, Apple II, and DOS. Later, it was ported to Amiga, Atari ST, ZX Spectrum, and NES.
The game, inspired by The Legend of Zelda, is considered one of the most influential computer role-playing games ever created. It has influenced Richard Garriott's Ultima VI: The False Prophet and Ultima VII: The Black Gate, but also Diablo and many others.
Times of Lore is also a masterpiece of programming on the Commodore 64; it features a massive world made of 13 thousand screens, shown without any need for loading, plus it uses a very advanced technique to display highly detailed sprites (combining a hi-res monochrome sprite plus a low-res multicolor sprite).
With excellent medieval music, great gameplay, impressive graphics, a difficulty level that is just right, Times of Lore it's a game any Commodore 64 fan should not miss. Have you tried it already?