Crusader kings II. I had a save file of a shia mandé dynasty (originally west african but converting to Islam was easier than reforming my faith) who had conquered most of north africa and parts of spain and the middle east. As an emperor I had what I believe was over a hundred counts directly below me. No dukes, certainly no kings and as little counts with multiple holdings as possible. Anyone who gained any kind of serious power in my realm who wasn't me had this habit of dying. Then, a vassal limit was introduced through an update forcing me to start introducing all manner of dukes, kings and other people on the fly. This would have been a lot of work and would have likely destabilised my empire for an entire generation providing that I'd be able to pull it off at all. Because being over the vassal limit by over 300% had some very bad effects, leading to immediate noble revolts and no support from my other vassals at all.
edit: oh and minecraft. I had the game in a very early stage and I had built dozens of towers to the height limit. (which was only 128 at the time) You would climb these towers with ladders. Than an update made it so that you now needed a ladder on every block you wanted to climb over rather than every two blocks. I believe I actually did add all the ladders I needed too, cutting an entire fortress in the process.
edit: oh and minecraft. I had the game in a very early stage and I had built dozens of towers to the height limit. (which was only 128 at the time) You would climb these towers with ladders. Than an update made it so that you now needed a ladder on every block you wanted to climb over rather than every two blocks. I believe I actually did add all the ladders I needed too, cutting an entire fortress in the process.