A small collection made in 3 games:
The Trade in slaves modifier with 0% marketshare:
How to win the papal game without much effort
Peacefull castille, after burgundy lost the battle my other allies including castillian beat france
Maybe not strange, but i never got an event about an earthquake in my games:
Sunni ottomans translating the holy book, this happens if you have catholic provinces...
Catholic rebels fight hungarian rebels about who will siege and defect a province back to hungary
Please forge a claim on your own cored province... i must have forgotten that mission
Enemy to strong? just double your army!
Portugese brasil can into wasteland (bug, game was startet in 1.4 and continued in 1.5)
Maybe not strange, but i have never seen AI denmark colonizing. And the do have the dieas for that. thought they are no colonizer