Party-based game is video game with random and unexpected outcome as parts of the game's mechanics while player skills are less contributive towards such gameplay that somewhat repetitive. Examples of party-based games are Mario Kart, UNO, and Monopoly Go.
Competitive-based game is video game where a high degree of player skills are required to be good at the game and the said skills will highly affect the outcome due its complexity. Examples of competitive-based games are Counter Strike, Valorant, DOTA, and Mobile Legends.