Despite having a simple concept, unstable dodgeball is actually very fun.
(It’s literally just an arena made of jenga blocks and your ball will knock back players and blocks, leading to cool strategies like throwing blocks at people and creating cover from incoming attacks)
Also I have to recommend sno day.
Every time I play that game with or without friends, we all wear a duck hat and go around attacking everyone without a duck hat until other people start to wear duck hats and join us. This succeeds in creating a following 100% of the time. (once we had about 6 people all devoutly loyal to this as if it was a cult)