Why are multiple engines different?

Neil Gould writes:

You don't understand much if you don't know what "...a commercial pilot
with a multi-engine rating..." means.

I understood that he had neither flown nor simulated this particular
scenario with this particular plane. Ratings don't matter.

This is totally irrelevant. Prior to an aircraft being certified -- as
would be all commercially available light twins -- tests have been
performed under all conditions.

So where is the official documentation for a Baron taxiing on one
engine, and what exactly does it say?

Finally, MSFS is not an aviation simulator, it is a game.

It's a simulator. In fact, many games are actually respectable
simulators under the hood.

--
Transpose mxsmanic and gmail to reach me by e-mail.