City Connection, Bugs Bunny’s Crazy Castle. While neither are co-op my mom and took turns playing crazy castle on the nes when I was a kid and we beat it. Core memory right there.

I think Tetris or Doctor Mario had 2 player modes but I’m not sure.

Does Sonic Spinball on the Genesis have multiplayer?

I don’t even boot windows anymore and it still takes over the first boot spot randomly.

Club soda or seltzer is a good start, if you want the fizz but not the sugar/flavor. If it’s the taste you like, try the syrup they make for fizzy water.

I kicked mine by winning a weight loss bet with a friend. Depression and anxiety caused the weight to come back, but I still haven’t had a soda in three years.