Well, you can tell it is a few years old since they have references to D&D 4rth edition, and not 5th edition. They should also include Legend of the 5 rings for samurai stuff imo. Would be fun having a digital version with all existing games in there. Would take forever to make though, but one could dream. But such a map would be huge even if we just restricted ourselves to games available in English.
Definitely needs a little web application where you select options and it guides you through the chart to the end. Should be easy enough for somebody to do.
Their future post-apocalyptic is GURPS Fallout. Need to add Gamma World and Apocalypse World, which others are we missing?
Which brings up all the other various Powered by the Apocalypse games. Does something like Monsterhearts require a "Teen Supernatural Romance" category? Or perhaps just Romance and include Blue Rose?
Blades in the Dark. Victorian Crime as a subset of fantasy.
Near-present we can add crime to the breakout and add Leverage.
Huh, it's got ICONS on it, but not Marvel Heroic Roleplay? Is ICONS a lot older than I thought?