On the Sinclair ZX Spectrum, Rana Rama has remained the most popular Gauntlet clone, maybe along with Into the Eagle's Nest. On the Commodore 64, it has its fans as well, less so on the Amstrad CPC, probably due to a rather clumsy port.
The only 16-bit version was Atari ST; it was quite well done, but I can say nothing about its popularity, except that it was on Automation disk #170.
