Jamie, how would you do this? I don't want to repeat "the opponent" in every sentence. And "he" is the pronoun that replaces it naturally. So what else can I use?
The scattered "he's" sprinkled on various help pages should be easy to fix using common techniques on gender-neutral/gender-inclusive writing.
Lines such as:
"Once the player knows the rules, he is awarded a white meeple."
are generally tweaked to:
"Once a player knows the rules, they are awarded a white meeple."
"Once players know the rules, they are awarded a white meeple."
"When a player knows the rules, a white meeple is awarded." --- or etc.
The all-male tutorial opponents is probably what you were really thinking about though, and I'm sure they would take more time given the number of tutorials.
The easiest option now may be to randomly select some tutorials and make the opponent a generic she. Players would note in short order that some are he and some are she.
Probably the better option from the start would have been giving each tutorial opponent a unique name. That would allow (or have allowed for) an escape from the repetitiveness altogether with more natural writing using he/she and the name of the opponent.
"Maria got the new card."
"She must now play one of her 4 actions."
"Let's see what Maria does!"