Not sure if you would call this a game, or more of a fun experiment, but every so often we make checklists for neck, armpits, stomach, ribs, thighs, feet, and so on.
Maybe make it a bit more elaborate by specifying toes, ball of feet, arches, heels, tops of feet, and such.
Now that the list is set up; one of you sets the other up for the "experiment" and teases, tickles, drives them crazy, and ultimately wtites down on the checklist how ticklish you were on a scale of 1 to 10. (Or 20, or 100, whatever you decide to grade their sensitivity as)
Its a cool way to monitor how ticklish you, or your mate are on any given day and see if any of it fluctuates at all which it often does.
Oh and you both can take turns so you both get to inflate the numbers, or give as ridiculous assessments, and reviews as you want.
It's pretty much all in good fun, and the analytical aspect of it appeals to alot of people in spite of their level of interest in tickling, or getting the best of you.
One time Kaye just unleash all fingers, feather, and whatever else she could use on me and "awarded" me perfect 10 scores for every body region; so I made sure that she got multiple second opinions for her test.😜
Great times. Hope you find a game that makes it fun for both of you.🤙