Akiba's trip is a Japanese game for ps3,4 & Vita
Where you have to fight an army of
synthetic vampires by stripping them
so they disolve in sunlight. Later in
the game you can earn the tickle attack.
Here's a video of it: https://www.youtube .com/watch?v=zRTE2NXOOqE (remove the space)
You can do this to both guys and girls. The game is actually pretty fun too. I wasn't really interested in it at first but the tickling kinda won me over and I was surprised how much I actually enjoyed the game.