This is one of those cases where the Master System port easily knocks out the NES one. The music, sound effects, graphics, and everything about this is just better all around. The characters and enemies move a lot smoother as well, so it doesn't look extremely choppy, like the Nintendo games do. This one is pretty addicting, and easily the out of all the 8 bit versions of Gauntlet 1 and 2. Still, they get much better later. This is more so just mindless addicting fun.
A study in corporate greed. Plenty of arcade games were designed to burn through quarters back in the day, but this one really takes the cake. It does still stand as one of the first multiplayer dungeon crawlers, but the combat itself is incredibly repetitive, as are the levels and unending hoards of monsters spawning ceaselessly until you take our their generators.
Played this multiplayer with my wife. It was fun. Pretty hectic and without freeplay enabled pretty impossible I would think. We beat several stages and had a good time. I would like to have had more time with it so I'll definitely try it again with her some time. I guess that speaks well of it though since I want to play more.