10. Remember, Nostalgia Always Wins
If the last few years of video games and Hollywood have taught us anything, it's that people are extreme suckers for nostalgia, for having something altogether familiar re-sold to them in a shiny new package.
At its most base level, the easiest thing a publisher can do to resurrect a dying franchise is simply remind fans of how great it used to be, by re-releasing its most beloved games as part of a remake or remaster collection.
This worked extremely well with Crash Bandicoot N. Sane Trilogy and also Tony Hawk's Pro Skater 1 + 2, both of which are largely credited with resurrecting their respective franchises.
Then there are games like Call of Duty: Modern Warfare, which didn't strictly remake the original 2007 game, but instead hearkened back to the stripped-down spirit of its predecessor, ditching the increasingly silly sci-fi nonsense for something a bit more down-to-Earth.
As much as we all might agree that nostalgia is one of the most powerful creative tools there is, deciding on the right way to exploit that nostalgia isn't always easy...