Super Mario Bros. released for C64

A pixel-perfect implementation of Super Mario Bros.
is now available for the Commodore 64, a good three decades after that computer's (and the Nintendo Entertainment System's) heydey.
This is a Commodore 64 port of the 1985 game SUPER MARIO BROS. for the Famicom and Nintendo Entertainment System. It contains the original version that was released in Japan and United States, as well as the European version. It also detects and supports a handful of turbo functionalities, and has 2 SID support.
Home computers of the era typically saw sub-par conversions of console hits, even when there was no real technical reason. Below, see Super Mario Bros. as originally released on 8-bit computer platforms; quite a disaster.

The Great Giana Sisters was a more accurate unofficial port that, for obvious reasons, displeased Nintendo and led to 'pressure' that saw it withdrawn from sale (though it did not, per gamer legend, file a lawsuit). It ultimately became a franchise in its own right.