There's 10 campaigns and each campaign has it's own unique events that will always occur alongside the random events. The random ones helps with replayability and it allows you to explore ways to create a specific character because it can drop extremely strong weapons or give you unique traits. A lot of the replayability comes from creating and building unique characters. Some events could technically hinder you but it gives you choices. There's also modding which could add longevity to the game.