How do you make a ninja in first edition D&D?

Well, as I recall, Dragon Magazine published something to that effect a time or two, but my own friends and I found it preferred our own version cobbled together from conventional classes out of the Player’s Handbook. We just had to tweak a few core rules, but the essential concept was simple.

Run the character as a Multiclassed Monk-Assassin. This of course ignores either the rule saying that Monks have to be human or the rule that only other races can be multi-classed. I guess, you could ignore both, but you have to ignore at least one of them to do this. My preference is to say Ninjas have to be human, but that this specific combination is allowed.

We didn’t really think of this as one character combining two different skill sets. We thought of it as one skill set that simply tracked through the rules system as two different classes.

As to alignment, the Ninja can be true Neutral or Lawful Evil.

Any weapons appropriate to ninjas are automatically allowed.

That’s it.