Here’s one of mine:
Jenga Fortress
Split Jenga pieces equally and sit in a large circle (on the floor or at a big table). Everyone has one piece that is marked. Then everyone builds a fortress to protect their marked piece (the marked piece must be stood up on its small side).
Everyone gets a projectile. We liked using those thick rubber bands that came on broccoli at the grocery store, but you could use Nerf guns, balled up paper, whatever–as long as it’s not too light and not too heavy.
Once everyone is ready, take turns firing at each other’s fortresses, trying to knock down their marked pieces. Nobody can touch their fortress at this point.
Last marked piece standing is the winner.
I made a pretty cool desktop fantasy role-playing game. It had cardboard puzzle like pieces that could be patched together into a dirt of dungeon maze. So it has quite a few layout permutations.
I vaguely remember playing it with some friends a couple of times. And we all enjoyed it.
I actually still have the pieces. I found them a few years ago. But I don’t remember the rules at all, and I didn’t write them down. So I no longer have any idea how to play it!