[REQUEST] What addons are used for events on things like StarwarsRP

I am working on server that is similar to starwarsRP, and when I say similar I mean like there is training needed at the beginning and there are rankings and promotions and such and I plan to also have events. While playing on a star wars RPserver, every once in awhile they would have a big event where the map changes and your teams fightsAI droids and AI vultures, etc. Once the fighting is complete, the map will change back to the main server map where people will meet back to a certain area and a high-ranking leader gives out promotions for certain really good players. I wanted to know if there are add-ons that exist where I can do these similar events.