Hi S.,
We played the memory game at my shower, but when I played it for my cousin's guests, they didn't care for it. I thought it was pretty fun. Of course there is the clothes pin game where you can't say a common word such as cute or baby.
I recently went to a shower and they played some feed the baby where they sat the two grandmothers one side and a blind folded person had to feed them, whoever finished first won. I thought this was too disrespectful for my mother in law. She nearly gagged twice because they fed her too fast and she hadn't swallowed yet.
I remember seeing a shower game book at the party store and as well, you can probably google baby shower games and come up with some different stuff.
If there isn't a name picked out yet, you can have everyone participate in a name. I am not sure how that can be turned into a game, but it would be nice if they chose the name you provided.
There is the yarn string or toilet paper around the belly game, where you guess the size of the mom to be's belly.
Even though I don't care for the smooshed chocolate bars in the diapers everyone seems to have a good time. They heat up a little bit of a chocolate bar and smoosh it into a diaper and everyone guesses what 4 or 5 bars are. It looks gross and everyone giggles.
I guess I am kind of a prude when it comes to these games, but you have to entertain them.
Possibly you could play a version of pregnant scattegories. That might be kind of funny.
Best of luck. Sorry I couldn't really be of help.