I'm willing to bet if we can change the conditions of the bet. (I don't want either of us playing Balan Wonderworld.)
The winner lists several games that they really, really like. The loser picks one from the list that they haven't played yet. Then they have to play it on normal difficulty for 50 hours or until they beat it. The loser has 30 days to complete the task.
Alright, that's fine by me. No restrictions of platforms?
Try to pick a variety of platforms if possible. I don't want to list a bunch of Genesis games to someone who doesn't have a Genesis (for example).
Just to be clear: I am betting the Switch outsells the PS2.