King of Tokyo is a dice-chucking game designed by Richard Garfield (creator of Magic: The Gathering), originally published by IELLO Games in 2011, in which players take the role of epic Godzilla-sized monsters battling for supremacy over Tokyo. Players roll a handful of dice each turn, picking which results to keep and re-rolling any unwanted dice two more times, Yahtzee-style, for a total of three rolls. The dice results determine your actions for that turn: each claw rolled deals a point of damage to other monsters, each heart heals you by one point, each lightning bolt gives you energy to spend on upgrade cards (which can grant you permanent bonuses or one-time benefits), and rolling three or more of the same number grants you that many star points.
At the heart of the game is Tokyo city, where monsters vie for control via a king of the hill type of mechanism -- only one monster can be in Tokyo at a time (two if playing with five or six players), and you get star points for going into and staying in Tokyo. While in Tokyo, your attacks hit every monster outside of Tokyo, but you can't heal unless you cede the city and flee to the outskirts, allowing someone else to swoop in and lay claim to Tokyo. Meanwhile, every monster outside of Tokyo attacks inwards, hitting whomever's in Tokyo. You win the game by being the first to reach 20 star points, or by being the last monster standing.
The relatively light rules, short playtime (30 minutes, according to the box), and whimsical nature of the game, what with its cartoon monsters punching each other and evolving over the course of the game to gain jet packs and fire breathing abilities, among countless other possibilities, all combine to make King of Tokyo a consensus "gateway" or "family" game. This is the type of game you buy when you're first getting into the hobby, or when you want a game to play with people who aren't interested in heavy strategy games with lots of rules and complexities. Its esteemed reputation among board game enthusiasts on BoardGameGeek and r/boardgames gave me enough confidence to buy King of Tokyo two years ago, when I was first starting my board game collection, and indeed, it was a lot of fun early on. But now, two years later, I just don't enjoy it very much.