in the first person ("go north" == "I go north")

I assumed it was in the imperative? I can't offhand think of any verb but "be", but I think I'd write "be cautious" not "am cautious" to the prompt.

Perhaps that's why some games put the computer's descriptive text in the first person? It's grammatically consistent, if the character in the situation and the player making the decisions are distinct, that the character should tell the player "I'm in a room etc" and the player should reply to them in the imperative "Then go north".

I think in fact the normal setup is more infinitive than imperative: the computer says "You are in a room etc", and then implicitly (by presenting the prompt) asks "What do you do?". To the question phrased like that, I think, "be cautious" would be more natural than "I am cautious".

I think there's a special "first person imperative" that applies to this sort of avatar situation. I'm now wondering how this is expressed in adventure games in other languages, especially those with a distinct imperative declension:

> VENE

> VIDE

Gallia est omnis divisa in partes tres.

> VICE