Super Smash Bros Ultimate can be described as a crossover multiplayer fighting game about playing competitively and unlocking characters from 3rd party games which can be played as to fight other players and with a huge selection of stages based off different games both inspired by Nintendo games and others inspired by 3rd party games.
One unique thing about this game is that it features a story-like mode called “World of Light” where players can fight CPU characters in order to unlock them and progress in the world of light story mode.
Something which makes Super Smash Bros iconic is that it offers a wide variety of modes such as single player and versus modes, and with it being famous for it having a wide variety of characters Super Smash Bros Ultimate has every playable character from previous Super Smash Bros games including new ones.
The huge variety of characters allows for a ton of playstyles every character with their own set of strengths and weaknesses that can be used to create countless strategies to add an extra layer of unique variety to the game.
In summary, Super Smash Bros Ultimate is a unique multiplayer fighting game with its huge variety of characters,gamemodes and stages which all come together to create countless unique strategies and offer something new to the game every time.