Game development can be a finicky thing. While many franchises have carefully plotted production times and sequel schedules, sometimes creators get caught off guard by a surprise hit. Since those often have no sequels in the works, the scramble to make one and bank on that sudden popularity can lead to massive tech and narrative headaches. Such projects are way more likely to crash and burn, snuffing out sequels in their infancy, but some survive. They endure long periods of dormancy like mammoths in digital ice, emerging as fully formed titles five, ten, even twenty years down the road.
That, however, can create an odd relationship between original and sequel. Even if the first one is an amazing title that still stands up to scrutiny, the comparison to a much younger and more advanced model can make it look... old. Really old. So old that once you see it, it's hard to unsee. Case in point, these games that are vastly dated by their sequels. Think I was lying when I said twenty years? Oh ho, you're in for a treat.